bluuebunny/crossref_metadata_2025 huggingface dataset:
Predictors of Resilience Among Adolescent Girls and Young Women Who Have Experienced Intimate Partner Violence and Sexual Violence in South Africa
Authors: Kuo Caroline , LoVette Ashleigh , Slingers Nevilene , Mathews Catherine
Published: April 2021

South Africa has some of the highest rates of intimate partner and sexual violence globally, with prevalence ranging from 10% to 21% among adolescent girls and young women (AGYW). Yet, few studies characterize the relationship between violence and resilience. Identifying factors associated with resilience following exposure to violence can guide the development of strength-based interventions that change modifiable protective factors to bolster resilience. Data were derived from a cross-sectional survey of AGYW aged 15 to 24 years in South Africa that took place from 2017 to 2018. This survey was part of a national evaluation of a South African combination HIV intervention for AGYW funded by the Global Fund to Fight AIDS, TB, and Malaria. A sample of 4,399 observations was achieved through a systematic random sampling frame of 35% of households in districts where AGYW were at highest risk for HIV, and where the intervention was implemented. Resilience was assessed using the Connor-Davidson Resilience Scale. Intimate partner and sexual violence were assessed using: (a) an adapted version of a questionnaire from the World Health Organization’s 2005 multicountry study on domestic violence against women, and (b) questions on lifetime experience of forced sex/rape. Nearly a third of AGYW (29.6%) reported intimate partner emotional and/or physical and/or sexual violence in the past year. Nearly a quarter of AGYW (23.74%) reported emotional violence, 17.48% reported physical violence, and 6.37% reported sexual violence from intimate partners. Nearly 8% (7.72%) reported forced sex/rape from intimate partners and/or nonpartners. More equitable gender norms, higher social support, and hazardous drinking were positively associated with higher resilience among those who experienced physical or sexual violence. This study addresses a gap in the resilience and violence literature. Future research should focus on the development of resilience-promoting interventions for individuals who have experienced violence.
Effects of graphene on thermal properties and thermal stability of polycarbonate/graphene nanocomposite
Authors: Sohel Md Amir , Mondal Abhijit , Arif P Mohammad , Thomas Sabu , SenGupta Asmita
Published: April 2021

Polycarbonate (PC) /graphene nanocomposite was prepared using multilayer graphene (MLG) with loadings of 0.5, 1, and 3 wt% via melt mixing process. Morphological, structural, and thermal properties of the PC/MLG nanocomposites are investigated to look into the influence of MLG on the nanocomposite. A significant increase (∼6.4°C) in glass transition temperature is observed upon the addition of 3 wt% of MLG into the polycarbonate matrix. This increase in glass transition temperature may be due to the interaction between the MLG and polycarbonate polymer matrix. The specific heat capacity of pure PC and PC/MLG nanocomposites varies linearly with temperature below their glass transition. Upon the addition of MLGs, the overall thermal stability of PC/MLG nanocomposites increases with MLG loadings. A maximum increase about 29.23°C in Tonset of thermal decomposition is observed in PC/MLG nanocomposite having 3 wt% of MLG loading. The activation energy ( Ea) of thermal decomposition is also calculated by kinetic analysis of thermal decomposition of the PC/MLG nanocomposites using Horowitz–Metzger and Broido’s methods.
Effect of unsupported sleepers on dynamic behavior of running vehicles and ride comfort index
Authors: Azizi Mojtaba , Shahravi Majid , Zakeri Jabbar-Ali
Published: April 2021

Nowadays, with various advancements in the railway industry and increasing speed of trains, the design of railway tracks and vehicles has become vitally important. One of the frequent problems of ballasted tracks is the existence of unsupported sleepers. This phenomenon occurs due to the lack of ballast underneath the sleepers. Here, a model is presented, in which a flexible track model in a multibody dynamics program is developed, in order to study the dynamic behavior of a vehicle. By utilizing the model, it is feasible to simulate unsupported sleepers on the flexible track including rail, sleeper, and ballast components. In order to verify the results of numerical model, a field test is performed. Findings indicate that, in the case of a single unsupported sleeper through the track, the ride comfort index increased by 100% after increasing the train speed from 30 to 110 km/h. Moreover, when it is needed to have ride comfort index improvement over the uncomfortable level, the vehicle speed should be less than 70 km/h and 50 km/h for tracks with one unsupported sleeper and two unsupported sleepers, respectively.
New probabilistic S-N curves modeling method with small-sample test data of composite materials
Authors: Ma Qiang , An Zongwen , Bai Xuezong , Ma Huidong
Published: April 2021

Considering the large dispersion when processing small-sample fatigue test data of composite materials, a new method for modeling probabilistic S- N curves is proposed in terms of the equivalent fatigue lives. An equivalent fatigue life conversion model is first established based on two fundamental assumptions to improve the small-sample information utilized. Subsequently, a backward statistical inference technique improved by particle swarm optimization is used to determine probabilistic S- N curves through the equivalent fatigue lives. Finally, the proposed method is verified in terms of precision and stability by the fatigue test data of carbon eight-harness-satin/epoxy laminate. The results indicate that the proposed method can offer an accurate description of the probabilistic behavior of composite materials with small-sample test data.
Drag coefficients of air rifle pellets with wide range of geometries
Authors: Ladommatos Nicos
Published: April 2021

Air rifle and air pistol target shooting are included in major intentional and national sports competitions and are also highly popular sport pastimes. Published scientific studies of pellet drag are very rare, in contrast to a large number of scientific studies published on aerodynamic drag of sports balls and other sports projectiles. Measurements are presented of the drag coefficients for 31 air rifle pellets of mainly 4.5 mm (0.177 in) calibre having a wide range of geometries. The drag coefficient measurements were made with a low-turbulence open wind tunnel at flow velocity of 200 m/s (Mach and Reynolds numbers 0.57 and 56,000 for 4.5 mm pellets). The detailed geometry of some pellets was altered systematically in order to improve understanding of how pellet geometry affects drag coefficient. The drag coefficient for the 31 pellets varied widely from 0.36 to 0.78, and it was influenced substantially by the curvature of the flow separating from the pellet head rim. Large curvatures delayed flow re-attachment onto the pellet tail, thereby lowering pellet base pressure and increasing the value of drag coefficient. Pellets with hemi-spherical or ogive-shaped noses generally had lower values of drag coefficient than pellets with other nose shapes. The presence of the pellet tail was beneficial by providing a surface onto which the flow detaching from the pellet rim could re-attach. However, for minimisation of drag coefficient, the pellet tail had to be of a certain optimum length which depended on the shape of the pellet nose. Small differences in pellet geometry had significant influence on the value of drag coefficient. Increase in air velocity from 120 to 200 m/s had small influence on the value of drag coefficient for three common sports pellets having flat, conical and dome-shaped noses.
Investigation on material combination technique to enhance the anti-wrinkle and anti-vibration characteristics of the planar membrane reflector
Authors: Shinde Swapnil D , Kumar Satish , Upadhyay SH
Published: April 2021

In recent trends, membrane structure has increased its applications in space missions due to its significant advantages, such as light in weight, higher folding and packaging efficiency, ease of deployment, and low on-Board volume requirement. The wrinkling and low natural frequency of vibration are the major problems with the membrane structure. This research presents a novel methodology of Kapton-Kevlar material combination for a planar membrane reflector to enhance anti-vibration and anti-wrinkling capabilities of the membrane structure. The comparative study is made for the wrinkle area, RMS error, and natural frequency of vibration with the employed approach. This study provides new insights into a material combination technique to increase performance characteristics of the space-borne membrane reflectors. The outcome of the wrinkling analysis is compared and found to be consistent with the method available in the literature. From the simulation results, it is observed that wrinkles are reduced, and the natural frequency of vibration is also increased significantly with the proposed method.
Finite element method estimation of temperature distribution of automotive tire using one-way-coupled method
Authors: Usmanova Zumrat , Sunbuloglu Emin
Published: April 2021

Numerical simulation of automotive tires is still a challenging problem due to their complex geometry and structures, as well as the non-uniform loading and operating conditions. Hysteretic loss and rolling resistance are the most crucial features of tire design for engineers. A decoupled numerical model was proposed to predict hysteretic loss and temperature distribution in a tire, however temperature dependent material properties being utilized only during the heat generation analysis stage. Cyclic change of strain energy values was extracted from 3-D deformation analysis, which was further used in a thermal analysis as input to predict temperature distribution and thermal heat generation due to hysteretic loss. This method was compared with the decoupled model where temperature dependence was ignored in both deformation and thermal analysis stages. Deformation analysis results were compared with experimental data available. The proposed method of numerical modeling was quite accurate and results were found to be close to the actual tire behavior. It was shown that one-way-coupled method provides rolling resistance and peak temperature values that are in agreement with experimental values as well.
COVID-19 and the National Library of South Africa: Adapting to the new normal
Authors: Shirley Jolene , Mawire Blessing , Baloyi-Sekese Musa
Published: April 2021

The National Library of South Africa (NLSA) like many libraries and institutions has been impacted by the COVID-19 pandemic. However, its approach has been that of deciding to embrace the change, adapting to an approach of working with stakeholders and focusing on how the future can best be forecasted so that the work done now can have a greater impact. The NLSA shares its experiences, learnings and approaches for this new normal and hopes this sheds light on how national, and all, libraries can adopt a culture of continuous growing and adapting whether in a pandemic or not.
Effect of surface sealant on surface roughness and bacterial adhesion of bulk-fill composites
Authors: Ozan Gunce , Eren Meltem Mert , Vatansever Cansu , Erdemir Ugur
Published: April 2021

Surface sealants are reported to ensure surface smoothness and improve the surface quality of composite restorations. These sealants should also reduce the bacterial adhesion on composite surfaces however, there is not much information regarding their performance on bulk-fill composite materials. The aim of this study was to evaluate the effect of surface sealant application on surface roughness and bacterial adhesion of various restorative materials. Disc-shaped samples were prepared from a compomer, a conventional composite and three bulk-fill composites. Specimens of each group were divided into two groups (n = 9): with/without surface sealant (Biscover LV, [BLV]). Surface roughness values were examined by profilometry and two samples of each group were examined for bacterial adhesion on a confocal laser scanning microscope (CLSM). Bacterial counts were calculated by both broth cultivation and microscopic images. Results were analyzed with one-way ANOVA and Bonferroni/Dunn tests. Following the BLV application, there was a decrease in the surface roughness values of all groups however, only Tetric N-Ceram Bulk and Beautifil-Bulk groups showed significantly smoother surfaces (p < 0.001). There were no significant differences among material groups without BLV application. Evaluating bacterial adhesion after BLV application, conventional composite had the lowest values among all followed by the compomer group. Beautifil-Bulk had significantly the highest bacterial adhesion (p < 0.05), followed by Tetric N-Ceram Bulk group. Without BLV application, there was no significant difference among bacterial adhesion values of groups (p > 0.05). CLSM images showed cell viability in groups. Bulk-fill composites showed higher bacterial adhesion than conventional composite and compomer materials. The surface sealant was found to be highly effective in lowering bacterial adhesion, but not so superior in smoothing the surfaces of restorative materials. So, surface sealants could be used on the restorations of patients with high caries risk.
Conscience and conscientious objection in nursing: A personalist bioethics approach
Authors: Lamb Christina , Pesut Barbara
Published: April 2021

The ability of nurses to act as moral agents in accordance with their conscience is both an essential human freedom and an important part of professional ethics. Recent developments in Canada related to Medical Assistance in Dying have revealed new and important challenges related to conscientious objection – challenges that may require rethinking of how nurses do professional ethics. Notably, the inclusion of a personalist bioethical approach is needed to introduce and explicate what conscience is for nurses to be able to apply it to nursing practice. In this article, we explore the importance of conscience and conscientious objection as ethical concepts to support nurses in addressing issues of conscience amid ethically challenging situations. We discuss how a personalist basis for conscience can support nurses to inclusively engage with one another across diverse moral perspectives.
Contribution of Maize-based Products to the Livelihood of Smallholder Processors in Rural Northern Nigeria
Authors: Makuachukwu Ojide Gabriel , Busie Maziya-Dixon , Tahirou Abdoulaye
Published: April 2021

In the smallholder value chains of maize, diversification of utilisation is an essential strategy towards enhancing the benefits drivable from the increase in maize production. This article identifies the contribution of maize-based products on poverty level among smallholder processors. The study, which was conducted in 30 rural communities in northern Nigeria, involved Focus Group Discussions and survey of 300 smallholder processors of maize-based products. Descriptive and inferential analyses were used. The results show that average annual profit among the interviewed smallholder processors of maize-based products was approximately N425,506 (about US$1,400). These processors faced several constraints which tend to keep them under poverty trap (vicious cycle of poverty). The result of the estimated two-step Tobit model shows that, with necessary interventions, profit from maize-based products has the capacity of keeping these processors out of poverty trap. The result indicates that as profit from maize-based products increases, the poverty probability index that household is not below poverty line of $1.90/day at 2011 purchase–power parity increases ( p < 0.05). Thus, household poverty among rural smallholder processors of maize-based product could be reduced drastically through interventions targeted at mitigating the identified constraints.
‘A woman has a problem of the type that she is a woman’: Feminisation in horse racing in Poland
Authors: Bossak-Herbst Barbara , Głowacka-Grajper Małgorzata
Published: April 2021

In the article, the authors examine the different phases of feminisation of the horse racing field in Poland, starting from the early communist times up to the present. The empirical material for the article is comprised of 20 in-depth interviews with women riders whose careers spanned different decades and is supplemented by field observation and statistics. Following the nationalisation of horse racing in 1950, women were excluded due to the employment policy pursued by the State Horse Racetrack Company and the traditional apprenticeship system. Things changed in 1968, when the status of amateur riders was formally established. After 1989, along with the privatisation of horse racing stables, a new influx of women riders was observed, although only a few have achieved the jockey status so far. The analysis of the social context and class background of women in horse racing is supplemented with the investigation of stereotypes on women’s attributes internalised by female riders. The main claim of the article is that although the socio-economic conditions for horse racing in Poland changed dramatically over many decades, women invariably played ‘rescue roles’, which placed them on the fringes of the world of horse racing.
Culture Sensitivity and the Puerto Rican Client
Authors: Ghali Sonia Badillo
Published: April 2021

Therapists need to understand how and why traditional family stability and parental authority are affected in the transition to life in mainland urban centers
Premarital Counseling for the Developmentally Disabled
Authors: Walker Philip W.
Published: April 2021

Retarded adolescents and young adults are experiencing new levels of social life in adult activity centers and prevocational training programs
Finding Meaning in Life After a Cancer Diagnosis: What Is the Role of Financial Strain?
Authors: Alonzi Sarah , Perry Laura M. , Hoerger Michael
Published: April 2021

Finding meaning in life is important for maintaining physical and mental well-being. Obtaining a deeper understanding of activities that patients with cancer find meaningful is essential in improving cancer care and increasing meaning in life in these individuals. The sample of the present study consisted of patients with cancer ( N = 61) who reported their levels of financial strain and listed types of activities that they found most meaningful as a part of an online study. Participants engaged in activities that could be grouped into four broad domains (companionship, personal responsibility, recreation, and existential). In addition, results showed that financial strain was associated with higher preference for activities in the existential domain and lower preference for activities in the recreation domain. Future researchers could extend this study by exploring why certain activities are found to be more meaningful and how to combat the influence of financial strain in cancer.
Nine Months of Labor: The Psychosocial Weight of a Pregnancy After a Gestational Loss
Authors: Fortin Stefany , Keitel Merle
Published: April 2021

This article reviews the literature on the experience of pregnancy for women who suffered a prior perinatal loss through miscarriage or stillbirth. Both psychological and social perspectives are considered, and findings synthesized with the first author’s reflection on the psychosocial circumstances and needs of women pregnant after a loss, using her personal loss and experience as a peer providing support to this population. Clinical implications highlight the importance of acknowledging the challenges faced by those carrying a child in the very same womb that had previously seen a devastating outcome.
Usefulness of the Biomarker TIMP-2•IGFBP7 for Acute Kidney Injury Assessment in Critically Ill Patients: A Narrative Review
Authors: Erstad Brian L.
Published: April 2021

Objectives:

To review the clinical usefulness of the biomarker TIMP-2•IGFBP7 in adult, general medical-surgical intensive care unit (ICU) settings.

Data Sources:

PubMed (1946 to mid-February 2021) and EMBASE (1947 to mid-February 2021) with bibliographies of retrieved articles reviewed for additional articles.

Study Selection and Data Extraction:

Studies evaluating use of the urinary TIMP-2•IGFBP7 assay in adult patients in ICU settings.

Data Synthesis:

Studies published after investigations leading to TIMP-2•IGFBP7 assay approval confirm the appropriateness of considerations discussed in product labeling, such as use of the test within 12 hours of assessment, use of a dichotomous 0.3 (ng/mL)2/1000 cutoff, and use only in combination with other assessments of acute kidney injury (AKI). However, as a biomarker routinely used for early identification of patients at risk for AKI in mixed ICU populations, the additional resources required for TIMP-2•IGFBP monitoring are difficult to justify because of limited data demonstrating usefulness in preventing or ameliorating AKI and its attendant complications.

Relevance to Patient Care and Clinical Practice:

Biomarkers are potentially useful not only for assessment and diagnosis of AKI, but also for practitioners involved in the management of nephrotoxic medications and medications needing adjustment for decreased kidney function.

Conclusions:

Although there is evidence to suggest that the urinary TIMP-2•IGFBP7 biomarker is helpful in predicting AKI progression in general medical-surgical ICU patients when used within 12 hours of patient assessment in combination with routine testing, including serum creatinine and urine output, there is little evidence that its use leads to improvements in clinically important patient outcomes.
Acinic Cell Carcinoma of the Breast: Report of a Case With Immunohistochemical and Next-Generation Sequencing Studies
Authors: Weaver Kaitlin D. , Isom James , Esnakula Ashwini , Daily Karen , Asirvatham Jaya R.
Published: April 2021

Acinic cell carcinoma of the breast is a rare subtype of triple-negative breast cancer that recapitulates the appearance of tumors seen in salivary glands. We present the case of a 42-year-old woman with an irregular, nontender mass above the left nipple during routine obstetric appointment at 24 weeks gestation. She was subsequently diagnosed with triple-negative invasive ductal carcinoma of the left breast, Nottingham grade 3, via core needle biopsy. She was treated with neoadjuvant therapy (doxorubucin and cyclophosphamide) antenatally and paclitaxel in the postpartum period followed by left mastectomy with sentinel node biopsy. The carcinoma in the mastectomy specimen showed a spectrum of morphologic patterns with immunohistochemistry revealing strong positivity for alpha-1-antichymotrypsin, epithelial membrane antigen (EMA), lysozyme, and S100. The histomorphology paired with the immunoprofile led us to the diagnosis of acinic cell carcinoma. We retrospectively performed immunostains in the core biopsy specimen, which demonstrated GATA-3 and DOG-1 positivity. Next-generation sequencing of the postneoadjuvant specimen using a 70-gene panel revealed 2 single-nucleotide variant (SNV) mutations: tumor protein 53 (TP53) (c.747G>T) SNV mutation and rearranged during transfection (RET) (c.2899G>A) SNV mutation.
Utilizing a Multidimensional Health Literacy Framework to Assess Cervical Cancer Screening Nonadherence
Authors: Galvin Annalynn M. , Garg Ashvita , Matthes Sarah , Thompson Erika L.
Published: April 2021

Health literacy is an amenable factor that can improve screening uptake. However, associations between the multidimensional health literacy domains and cervical cancer screening nonadherence are not known and should be considered to improve screening rates. The current quantitative study assessed the associations of multiple health literacy domains with cervical cancer screening nonadherence. Women aged 30 to 65 years without a hysterectomy were surveyed online ( N = 812). Assessing, understanding, and appraising measures from the European Health Literacy Survey Questionnaire were adapted for cervical cancer screening. The outcome variable measured the application of cervical cancer information regarding adherence to the 2012 cervical cancer screening guidelines (yes/no). Adjusted logistic regression odds ratios (aORs) estimated nonadherence. Most of the women were non-Hispanic (81.4%) or White (68.1%), and aged 30 to 39 years (40%). The majority of the women (71%) were adherent to screening recommendations. The model with all domains of health literacy had the best model fit statistics compared with other models with different health literacy components. Older age and lack of insurance were statistically significant for screening nonadherence. Difficulty understanding health information (aOR = 3.15; 95% confidence interval [CI; 1.80, 5.51]) and less worry about cervical cancer (aOR = 1.74; 95% CI [1.03, 2.94]) were associated with higher odds of nonadherence. Higher cervical cancer knowledge (aOR = 0.93; 95% CI [0.87, 0.98]) and Hispanic ethnicity (aOR = 0.36; 95% CI [0.21, 0.61)] were associated with lower odds of nonadherence. Incorporating a multidimensional health literacy framework may better inform the need to develop easily understood interventions that address cervical cancer perceived vulnerability and acknowledge systemic sociodemographic influences on screening perceptions.
Bilateral combined resection-recession of the same rectus muscle versus Fadenoperation for treatment of purely tonic esotropias
Authors: Fremont Félix , Thouvenin Dominique
Published: April 2021

Purpose:

To compare the efficiency of bilateral combined resection-recession surgery of the medial rectus muscle versus using a modified Fadenoperation for surgical management of esotropias that totally resolve under general anesthesia, which we called “purely tonic” esotropias.

Methods:

We included 65 unselected consecutive cases of patients with purely tonic esotropias who underwent surgery between October 2017 and 2018. Patients were divided into group I, who underwent a combined resection and recession of medial recti muscles, and group II, who underwent a bilateral medial rectus Fadenoperation using posterior strapping. A satisfactory outcome was defined as deviation ⩽10 prism diopters (PD), at near and distance fixation, between 3 and 6 months postoperatively.

Results:

Mean initial deviation was in group I, 19.6 PD and 32.0 PD, in group II, 23.6 PD and 33.5 PD, at distance and near fixation respectively. Postoperatively, in group I, 31 patients (91.2%) showed satisfactory alignment at near and distance fixation. Post-operatively, in group II, 25 patients (80.6%) showed satisfactory alignment at near and distance fixation.

Conclusion:

Our results suggest both techniques are good options to treat purely tonic esotropias.
A novel missense mutation of CRYBA1 in a northern Chinese family with inherited coronary cataract with blue punctate opacities
Authors: Ni Shu-Hua , Zhang Juan-Mei , Zhao Jun
Published: April 2021

Purpose:

To demonstrate the underlying genetic defect that contribute to inherited cataract in a northern Chinese pedigree.

Methods:

The study recruited a family pedigree with a diagnosis of bilateral coronary cataract with blue punctate opacities. Fourteen family members and 100 healthy volunteers were enrolled. DNA sample of the proband in this family were analyzed by high-throughput sequencing, which was then demonstrated by Sanger sequencing in the remained people in the family and 100 controls. The functional effect of mutant genes was investigated via bioinformatics analysis, including Polymorphism Phenotyping version2 (PolyPhen-2), Protein Variation Effect Analyzer (PROVEAN v1.1.3) Scale-Invariant Feature Transform (SIFT), and Mutation Taster.

Results:

In this three-generation family, a novel heterozygous mutation was found in the kinase domain of CRYBA1 gene (c.340C > T, p.R114C), which was only detected in patients in the family with inherited cataract and were not detected in the remained people in the family nor in normal people. The pathogenic effect of the mutation was verified via bioinformatics analysis.

Conclusion:

Our study presented the molecular experiments to confirm that a novel missense mutation of c.340 C > T located in exon 4 of CRYBA1 gene results in a bilateral coronary cataract with blue punctate opacities, which enriches the mutation spectrum of CRYBA1 gene in inherited cataract and deepens the understanding of the pathogenesis of inherited cataract.
Multimodal imaging in a case of best vitelliform macular dystrophy
Authors: Corradetti Giulia , Corvi Federico , Sadda SriniVas R
Published: April 2021

We describe a case of Best Vitelliform Macular Dystrophy using the Mirante device by Nidek, a multi-modal confocal scanning laser ophthalmoscopy (SLO) system equipped with Retro Mode Illumination, a relatively new retinal imaging modality.
Porous tantalum acetabular cups for reconstructions after peri-acetabular resections of primary bone tumours
Authors: Zucchini Riccardo , Sambri Andrea , Giannini Claudio , Fiore Michele , Calamelli Carlotta , Donati Davide Maria , De Paolis Massimiliano
Published: April 2021

Introduction:

Periacetabular reconstruction after resection of primary bone tumour is a very demanding procedure. They are frequently associated with scarce functional results and a high rate of complications. We report a series of patients with periacetabular resections for primary bone tumours and reconstruction with a porous tantalum (PT) acetabular cup (AC).

Materials and methods:

27 patients (median age 30 years) were included, being affected by primary bone tumours of the pelvis and treated with peri-acetabular resection and reconstruction with a PT AC. The diagnoses were 13 osteosarcomas, 7 chondrosarcomas and 7 Ewing sarcomas. Function was assessed with the Harris Hip Score and complications were classified according to Zeifang.

Results:

The median follow-up was 70 months. 1 patient required removal of the PT AC because of implant associated infection 55 months after surgery. There was 1 hip dislocation and no case of aseptic loosening. At final follow-up, the median HHS was 81 points (range 48–92).

Conclusions:

The used PT AC had good medium-term survival rates and good functional results. This technique is a viable reconstructive option after resections of periacetabular primary bone sarcomas.
Clinical, functional and radiographic outcomes after revision total hip arthroplasty with tapered fluted modular or non-modular stems: a systematic review
Authors: Koutalos Antonios A , Varitimidis Sokratis , Malizos Konstantinos N , Karachalios Theofilos
Published: April 2021

Purpose:

The aim of the study was to systematically evaluate clinical outcomes of tapered fluted stems, either monoblock or modular, in revision total hip arthroplasty.

Methods:

PubMed, EMBASE and Web of Science and Cochrane databases were systematically searched by 2 researchers. Clinical studies reporting primarily on survival and re-revision rates, and secondarily on subsidence, dislocation, intraoperative fractures, periprosthetic fractures and infection were included. 2 investigators assessed the quality of the studies.

Results:

46 studies were included in this review, reporting on 4601 stem revisions. The pooled re-revision rate was 5.1% and long-term survival ranged from 75% to 98.5%. No differences were observed between monoblock and modular stems regarding re-revision rate, dislocation rate, periprosthetic fracture rate or infection rates. Monoblock stems exhibited more subsidence and modular stems displayed more intraoperative fractures.

Conclusions:

Satisfactory results can be obtained with the use of tapered fluted end-bearing stems. Monoblock stems offer the same clinical results as modular stems.
Modified Dunn procedure versus percutaneous pinning in moderate/severe stable slipped capital femoral epiphyses
Authors: Galletta Claudia , Aprato Alessandro , Giachino Matteo , Marre’ Brunenghi Giorgio , Boero Silvio , Turchetto Luigino , Massè Alessandro
Published: April 2021

Background:

The modified Dunn procedure (MDP) has risen enthusiasm in treating slipped capital femoral epiphyses (SCFE) due to the anatomic reduction and high patients’ satisfaction rates at long-term follow-up. Main aim of this study is to compare clinical and radiographic outcomes of 2 cohorts with moderate to severe stable SCFE treated by MDP and in situ fixation.

Methods:

Medical records were analysed to collect demographic data, comorbidities and time from slip to surgery. The collected postoperative data were: avascular necrosis (AVN); complications; progression of osteoarthritis and subsequent procedures. Southwick angles (SA), alpha angles and Klein line were measured on the preoperative x-rays, on the immediate postoperative period and at the latest follow-up. Outcomes scores were recorded by the following questionnaires: the Harris Hip Score, the Hip disability and Osteoarthritis Outcome Score, the Merle d’Aubigné and Postel score and the Western Ontario and McMaster Universities Arthritis Index. Kaplan-Meier survivorship curve was calculated.

Results:

We compared 81 hips treated by MDP with 22 hips treated by in situ pinning (PS) for moderate/severe stable SCFE. No significant differences were found between the 2 groups in terms of age, BMI, comorbidities and preoperative slip angles. At the latest follow-up, postoperative anteroposterior mean slip angles were respectively 6.2 and 19.9° in MDP and PS group ( p = 0.3). Slip angles in frog lateral view were 11° in the MDP group and 39.7° in the PS group ( p = 0.2). MDP group achieved better correction angles on frog leg view (11° vs. 39.7°; p < 0.001). There was no statistically significant difference in the occurrence of AVN among both groups (19.7% MDP group vs. 31.8% PS group) ( p = 0.2).

Conclusions:

The MDP in treating severe stable SCFE showed the best deformities corrections in conjunction with the highest functional scores at long-term follow-up and similar rates of osteonecrosis compared to in situ fixation.
Using a ring to locate femoral head centre in total hip arthroplasty
Authors: Diamond Owen J , Hill Janet C , McCann Aaron J , McGrath Cormac , Napier Richard J , Beverland David E
Published: April 2021

Aims:

Traditional methods of determining femoral head centre (FHC) during total hip arthroplasty (THA) rely on measuring the distance from a fixed point on the femur or using a calliper. The aim of this experiment was to investigate how accurately a simple circular ring could locate FHC.

Methods:

144 consecutively available femoral heads (FHs) were collected from patients undergoing THA. Each FH was orientated and mounted on a Sawbone, to create a model of its position on a proximal femur. The ring was applied to the posterior aspect of the FH and a head-centre pin (HCP) was then drilled into the FH and the ring removed, leaving the HCP in place. Each FH was then photographed normal to the axis of the HCP. A MATLAB analysis program then assessed the accuracy of the ring in locating FHC.

Results:

Mean location accuracy for FHC was 1.77 (range 0.07–5.83) mm with 97.2% within 4 mm and all but 1 within 5 mm.

Conclusions:

This ring device located FHC to within 4 mm in 97% of a series of osteoarthritic FHs. This indicates that the posterior aspect of the FH maintains its sphericity late into the osteoarthritic process. Having a simple FHC location device during THA would be of value to control leg length and offset when using the posterior approach.
Complications of primary total hip arthroplasty in human immunodeficiency virus-positive patients with femoral head osteonecrosis
Authors: Youngman Tyler R , Riepen Dietrich W , Rinehart Dustin B , Thota Dharani Rohit , Sun Joshua J , Telford Clara L , Huo Michael H
Published: April 2021

Background:

Femoral head osteonecrosis (FHON) is a well-recognised complication in patients with human immunodeficiency virus (HIV) infection. Total hip arthroplasty (THA) is a reliable solution to FHON and has provided functional improvement and pain relief in these patients. Higher complication rates, in particular infections, have been reported in the series of THAs done in the HIV-positive patients. The purpose of this study was to evaluate the complication rate of THA for FHON in HIV-positive patients managed with the highly active antiretroviral therapy (HAART) protocols.

Methods:

A retrospective review was performed of HIV-positive patients with FHON who underwent THAs over a 10-year period at a single institution.

Results:

A total of 56 THAs (44 patients) met the inclusion criteria. The mean age at the time of THAs was 47 (range 34–60) years. Of the 44 patients, 39 (88.6%) were males. The mean follow-up was 6.6 (range 2.0–11.3) years. The overall complication rate was 12.5%, with 2 (3.6%) cases of deep periprosthetic infections.

Conclusions:

HIV-positive patients with FHON undergoing THAs do have a considerable complication rate (12.5%). The deep periprosthetic infection rate (3.6%) in these patients, however, has decreased with contemporary disease modification protocols.
Driving performance and turning reaction time following hip arthroscopy for FAIS: does capsular repair matter?
Authors: Yoshida Brandon , Bolia Ioanna K , Collon Kevin , Lan Rae , Matthews Robert , Hatch George F , Weber Alexander E
Published: April 2021

Purpose:

(1) To compare the pre- and postoperative driving performance in patients undergoing hip arthroscopy for femoroacetabular impingement syndrome (FAIS); (2) to examine the differences in driving performance between patients with versus without capsular repair.

Methods:

Patients who underwent arthroscopic hip surgery for FAIS were included. Driving performance of participating patients was collected using a driving simulator preoperatively and at 2 weeks, 4–6 weeks and 8–12 weeks postoperatively. Data collected included demographics, surgery laterality, intraoperative procedures, left and right turn reaction time, total turn reaction time, gas off time (GOF), and break reaction time (BRT). Repeated measures analysis of variance (ANOVA) was used for statistical analysis.

Results:

21 subjects (9 males, 12 females) with a mean age of 30 ± 9 years were included and 57.1% of the subjects had right-sided surgery. There was no difference between the mean preoperative and the 2-week postoperative left (0.72 seconds and 0.75 seconds, respectively) right (0.77 seconds and 0.75 seconds, respectively), and total (0.74 seconds and 0.75 seconds, respectively) turn reaction times as well as GOF (0.62 seconds and 0.60 seconds, respectively) and BRT (0.92 seconds and 0.93 seconds, respectively), indicating that the patients’ driving performance returned to the preoperative level as early as 2 weeks following hip arthroscopy for FAIS. There was no significant difference amongst any of the driving variables between patients who underwent capsular repair (50%) and those who did not. There was no significant difference amongst any of the driving variable s between patients who underwent left versus right hip arthroscopy.

Conclusions:

Patients’ driving performance returns to the preoperative level as early as 2 weeks after hip arthroscopy for FAIS. Surgery laterality nor capsular repair make any significant difference in the time for driving abilities to return to baseline. The impact of intraoperative procedures performed, and the analgesic medications used postoperatively on the driving ability of patients undergoing hip arthroscopy warrants further investigation in larger patient populations.
Perceptions of intercultural religious music and intercultural competence in a Southern U.S. public middle school eighth grade women’s choir: A case study
Authors: Mercado Emily M
Published: April 2021

The purpose of this case study was to examine the researcher’s perceptions of student participants’ intercultural competence during rehearsals, focus groups, and interviews and the perceived benefits and challenges when implementing a researcher-designed curricular unit titled Religious Choral Music from the Christian, Jewish, and Muslim Worlds in one eighth grade middle school women’s choir. Using Deardorff’s intercultural competence process framework, which provides a method for exploring and categorizing elements of intercultural competence including attitudes, knowledge/skills, internal outcomes, and external outcomes, the researcher adapted Deardorff’s framework to represent how the student participants demonstrated intercultural competence during the music unit, focus groups, and interviews. The perceived benefits of the music unit included student participants’ emerging intercultural competence — their positive attitudes and knowledge of unfamiliar religions broadened their cultural understanding, and their internal and external behaviors demonstrated respect toward religious and cultural differences. The perceived challenges of the music unit included a lack of resources, assumptions that emerged as a result of teaching about religious music, and intersections that occurred for some between religious music at their school, home, and house of worship. Finally, implications for teaching practice based on these findings are that music teachers should consider engaging students in discussions surrounding the religious and cultural elements of diverse religious music intended to foster intercultural competence.
An intersectional approach to media coverage of politics in New Zealand: The case of Metiria Turei and Paula Bennett
Authors: Galy-Badenas Flora , Gray F Elizabeth , Cassidy Fiona
Published: April 2021

This study analyses media coverage of two Māori women politicians in Aotearoa New Zealand. This article adopts an intersectional lens to critically examine the discriminatory ideologies at play in mainstream New Zealand media coverage of Metiria Turei and Paula Bennett. The analysis reveals that although the coverage examined in this article presents the Māori heritage of the two women very differently, the coverage pays close attention to both women’s gender and bodies while simultaneously diminishing their individuality by folding them into stereotypes. Classification and disempowerment of ‘stroppy women’/‘stirrer Māori’ are enabled by the intersection of racist, sexist and classist discourses.
Clustering and country destination performance at a global scale: Determining factors of tourism competitiveness
Authors: Gómez-Vega Mafalda , Herrero-Prieto Luis César , López Marcos Valdivia
Published: April 2021

Our aim is to evaluate the efficiency of tourist destinations at a global scale, considering 140 countries and drawing on World Economic Forum 2019 data. The approach follows three stages. First, we try to solve the problem of sample heterogeneity through cluster analysis to obtain homogeneous groups of countries. Second, we apply data envelopment analysis to evaluate countries’ efficiency as tourist destinations, considering a territorially based virtual production function which optimizes the flow of revenue from international tourism grounded on a set of inputs such as accommodation capacity, employment of tourist sector and volume of tourist arrivals. Finally, we identify which external factors might determine tourism efficiency by using bootstrap truncated regression analysis. We obtain two groups of countries which evidence differential levels of competitiveness. Rather than natural resources, cultural heritage in a broad sense seems to act as factor that enhances tourism efficiency.
The effects of a tactical games model unit on students’ volleyball performances in elementary school
Authors: Sgrò Francesco , Coppola Roberto , Schembri Rosaria , Lipoma Mario
Published: April 2021

The purpose of this study was to examine the effects of a tactical games model instructional plan on game-play volleyball performances of elementary school students, taking into account their skill level. In total, 39 fourth-grade students (average age: 8.9 years) participated in a 13-week unit, in which each lesson exaggerated the use of small-sided games. In-game performances were assessed via the Team Sport Assessment Procedure, while students played a 10-minute modified game (four versus four). Data were collected pre- and post-intervention, and after the summer vacation (retention test). A 2 (skill level) × 3 (time) analysis of variance with repeated measures was used to compare students’ performance, and the relevant effects were interpreted mainly by means of confidence intervals and effect size measures. At the end of the instructional period, all participants had an overall moderate to large improvement, and this global improvement seems to have remained at least until the end of the summer vacation. Lower-skilled students attained a larger and more established improvement than high-skilled students did. However, some detrimental effects on in-game students’ performance existed at the end of the instructional period. Therefore, teachers have to take into account students’ skill levels when designing their lessons because, if small-sided games are adequately considered and managed, students’ learning processes can be enhanced. Furthermore, the students should be assigned appropriate learning activities to avoid summer learning loss in physical education.
Gender identity development in children and young people: A systematic review of longitudinal studies
Authors: Stynes Hannah , Lane Chloe , Pearson Beth , Wright Talen , Ranieri Veronica , Masic Una , Kennedy Eilis
Published: April 2021

Background:

Children are presenting in greater numbers to gender clinics around the world. Prospective longitudinal research is important to better understand outcomes and trajectories for these children. This systematic review aims to identify, describe and critically evaluate longitudinal studies in the field.

Method:

Five electronic databases were systematically searched from January 2000 to February 2020. Peer-reviewed articles assessing gender identity and psychosocial outcomes for children and young people (<18 years) with gender diverse identification were included.

Results:

Nine articles from seven longitudinal studies were identified. The majority were assessed as being of moderate quality. Four studies were undertaken in the Netherlands, two in North America and one in the UK. The majority of studies had small samples, with only two studies including more than 100 participants and attrition was moderate to high, due to participants lost to follow-up. Outcomes of interest focused predominantly on gender identity over time and emotional and behavioural functioning.

Conclusions:

Larger scale and higher quality longitudinal research on gender identity development in children is needed. Some externally funded longitudinal studies are currently in progress internationally. Findings from these studies will enhance understanding of outcomes over time in relation to gender identity development in children and young people.