bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic modeling of fluid nonlinear compression loss and flow loss oriented to fault diagnosis of axial piston pump
Authors: Geng Bao-long , Gu Li-chen , Liu Jia-min , Shi Yuan
Published: July 2021

Volumetric efficiency (VE) is an extremely important index to evaluate the performance of pump and motor. Efforts have been concentrated on the causes and character of leakage loss, but few quantitative analyses of pump kinematic clearances (KCs) identification and nonlinear compression loss caused by air content are discussed. This paper clarifies the nonlinear compression loss resulted from the air content of the oil in detail and proposes an improved flow loss model of the swash-plate axial piston pump (SAPP). Then, combining the improved model with experimental results, the KCs of SAPP are identified. It has been verified that a reasonable sampling path is useful for reducing sampling numbers and guaranteeing identification accuracy. Finally, the identification and quantization of the wear fault of SAPP are realized by analyzing the estimated value of KCs. The proposed method is simple and easy to implement and shows high predictive accuracy. It provides a possible and promoting technology support for the autonomous calibration of the system parameters and the active compensation of the system control.
Composite attitude fault tolerant tracking control for flexible satellite with time delay
Authors: Xu Xiaofeng , Chen Mou , Li Tao , Shao Shuyi , Wu Qingxian
Published: July 2021

This article deals with the problem of attitude tracking control for flexible satellite under flexible vibration disturbance, actuator fault and time delay. Based on disturbance observer and fault tolerant control techniques, the flexible vibration disturbance and actuator fault are effectively estimated by disturbance observer and fault estimation observer, respectively. Meanwhile, a delay-dependent attitude tracking feedback controller is designed to ensure that the reference attitude is stably tracked. To reduce the conservatism of the designed algorithm, a time delay correlative decomposition factor is introduced to make the flexible satellite have a better performance for attitude tracking control. Finally, the effectiveness of the proposed method is illustrated by numerical simulations.
Thomas Shapter (1809–1902) of Exeter: Nineteenth century epidemiologist, physician, psychiatrist and author
Authors: Selley Peter J
Published: July 2021

Thomas Shapter spent almost all his working life in Exeter, Devon. He lived to be 93 years old. He is remembered primarily for his book describing the 1832 epidemic of cholera in Exeter in which 402 people died.
Dynamic Co-movement and Volatility Spillover Effect Between Sukuk and Conventional Bonds: A Comparison Study Between ASEAN and GCC
Authors: Danila Nevi , Azizan Noor Azlinna , Suprihadi Eddy , Bunyamin Bunyamin
Published: July 2021

Sukuk and conventional bonds gain their popularity in the global market. Hence, an observation of the dynamic correlation and transmission of volatility between these two instruments is relevant. This article investigates the volatility spillover of sukuk and conventional bond markets by using GARCH-BEKK model. Then, we measure the dynamics of the co-movement of both markets by using GARCH-DCC model, and finally, we examine the macroeconomic factors that determine the dynamic conditional correlation between sukuk and conventional bonds in two Association of Southeast Asian Nations (ASEAN) markets (i.e., Indonesia and Malaysia) and four Gulf Cooperation Council (GCC) markets (i.e., Kingdom of Saudi Arabia, UAE, Qatar and Oman). The data reveal unidirectional and bidirectional volatility spillovers of sukuk and bond indices. The results also show strong evidence of dynamic conditional correlation for all markets. On the basis of the BEKK and dynamic conditional correlation (DCC) results, we infer that bonds and sukuk in ASEAN and GCC markets show the efficiency of the markets, which do not offer any diversification benefits to investors for having both instruments in their portfolios. As regards portfolio diversification strategies, investors must pay attention to the co-movements and spillover of both markets accordingly. Finally, only Oman market is influenced by all macroeconomic variables.
A resisting enclave of social rights – protecting the children of former workers: C-181/19 Jobcenter Krefeld – Widerspruchsstelle v JD
Authors: Jacqueson Catherine
Published: July 2021

The boundaries of financial solidarity between the Member States have long been a hotly debated issue. With Jobcentre Krefeld, the Court puts an end to the saga of the rights of children of former workers and their primary carer. It firmly anchors its ruling in the free movement of workers and distinguishes the case from the Dano and Alimanovic cases.
Postmodernism and judicial notice: How common is common knowledge?
Authors: Sanderson Harry
Published: July 2021

This article considers how postmodernist thought can illuminate the doctrine of judicial notice. Specifically, it considers how postmodernist critiques of empiricism have challenged the idea of ‘indisputable’ facts which inform judicial decision-making. It argues that, while the practical realities of judicial administration must be borne in mind, increased sensitivity to the arbitrary nature of notorious facts will lead to more accountable decision-making.
A Parent-Implemented Shared Reading Intervention via Telepractice
Authors: Akemoglu Yusuf , Hinton Vanessa , Laroue Dayna , Jefferson Vanessa
Published: July 2021

We describe a study of the internet-based Parent-Implemented Communication Strategies–Storybook (i-PiCSS), an intervention designed to train and coach parents to use evidenced-based naturalistic communication teaching (NCT) strategies (i.e., modeling, mand-model, and time delay) and RTs while reading storybooks with their young children with disabilities. Three participating parents were trained and coached via telepractice technologies (videoconferences, video editing software). Zoom software was used for videoconferencing and Camtasia software was used to record the training and coaching sessions and to edit the recorded session for feedback delivery purposes. Using a single-case multiple-baseline design across NCT strategies within each family, we examined (a) parents’ fidelity use of the three NCT strategies, (b) parents’ use of book RTs, and (c) child language and communication outcomes. The entire intervention period lasted 8 weeks. After training and coaching, parents used the modeling, mand-model, and time delay strategies with higher rates and higher quality (accuracy). Children initiated more communicative acts upon parents’ use of time delay and increased their numbers of single- and multiple-word responses.
Trust Propensity Across Cultures: The Role of Collectivism
Authors: Westjohn Stanford A. , Magnusson Peter , Franke George R. , Peng Yi
Published: July 2021

Does collectivism influence an individual’s willingness to trust others? Conflicting empirical results from previous research and the role of trust in international marketing make this question important to resolve. The authors investigate this question across cultures and at the individual level with four studies using multiple methods. Study 1 establishes correlational evidence between societal-level collectivism and individual-level trust propensity with results from a multilevel analysis of data from over 6,000 respondents in 36 countries. Study 2 offers an individual-level analysis using the trust game, introducing a more rigorous behavioral outcome variable. Study 3 contributes causal evidence at the individual level based on experiments in both the United States and China and offers evidence of social projection as the explanatory mechanism. Finally, Study 4 demonstrates managerial relevance by using advertising to prime collectivism and assessing its effect on trust in the firm.
Utilizing Assessment Tools in Decreasing Fall Risk Among Community-Dwelling Adults: A Quality Improvement Project
Authors: Fontenot Justin
Published: July 2021

Although there are standardized fall risk assessment tools in home care clinical practice, there are no standardized tools to reduce fall risk. This quality improvement project aims to test the adaptability of the Fall TIPS (Tailoring Interventions for Patient Safety) tool among the community-dwelling adult population by measuring the impact of the tool’s implementation on client fall risk. Participants included n = 54 clients enrolled in home care and n = 14 members of the clinical team. This project used a quantitative method with a quasi-experimental pre-and post-intervention design. The quality improvement project implemented the Fall TIPS tool, and fall risk was measured using the Morse Fall Risk Assessment (MFRA). The Fall TIPS tool was provided to participants by visiting staff, and interventions were selected based on the participant’s assessment. Participants’ fall risk was scored during in-person home visits, and the results were recorded in the electronic health record. A dependent 2-tailed t-test measured the variance of means between the pre-and-post groups. The pre-intervention MFRA score mean was 63.43 ± 22.52; p = .000 and the mean score in the post-intervention group was 58.15 ± 22.49; p = .000. The mean difference between the pre-and post-groups was 5.28. Implementing the Fall TIPS toolkit in the home care clinical setting reduced fall risk post-intervention and offered tools for future evaluation in home care settings.
Static and dynamic response of sandwich beams with lattice and pantographic cores
Authors: Solyaev Yury , Babaytsev Arseniy , Ustenko Anastasia , Ripetskiy Andrey , Volkov Alexander
Published: July 2021

Mechanical performance of 3d-printed polyamide sandwich beams with different type of the lattice cores is investigated. Four variants of the beams are considered, which differ in the type of connections between the elements in the lattice structure of the core. We consider the pantographic-type lattices formed by the two families of inclined beams placed with small offset and connected by stiff joints (variant 1), by hinges (variant 2) and made without joints (variant 3). The fourth type of the core has the standard plane geometry formed by the intersected beams lying in the same plane (variant 4). Experimental tests were performed for the localized indentation loading according to the three-point bending scheme with small span-to-thickness ratio. From the experiments we found that the plane geometry of variant 4 has the highest rigidity and the highest load bearing capacity in the static tests. However, other three variants of the pantographic-type cores (1–3) demonstrate the better performance under the impact loading. The impact strength of such structures are in 3.5–5 times higher than those one of variant 4 with almost the same mass per unit length. This result is validated by using numerical simulations and explained by the decrease of the stress concentration and the stress state triaxiality and also by the delocalization effects that arise in the pantographic-type cores.
Social impairment in children with epilepsy assessed by the social responsiveness scale
Authors: Aburahma Samah K , Hammouri Hanan , Hazaimeh Ethar , Jbarah Omar , Nassar Ahmad , Almasri Ayham , Al Momani Miral , Bashtawi Mahmoud
Published: July 2021

Children with epilepsy are at risk for impaired social cognition and autism. We aimed at evaluating the utility of the social responsiveness scale (SRS) for assessment of social impairment in these children. Prospective study; the SRS was applied to a group of children with epilepsy and a healthy control group. Intellectual disability in the epilepsy group was assessed utilizing adapted versions of the Wechsler Intelligence and adaptive behavior scales. One hundred and one children with epilepsy and 92 healthy children were included. The majority of children in both groups had normal SRS scores. Significant differences were identified in children with high total scores indicating significant deficiencies in reciprocal social behavior; high scores were found in 16% of children with epilepsy versus 7% of normal children, p < .05, particularly involving social communication, p < .05. Intellectual disability was identified in 42% of children with epilepsy, particularly processing speed index, p < .001. Intellectual disability had a significant effect on total scores, p = .016. Children with epilepsy have increased risk of social impairments. Social impairments are more likely in the presence of intellectual disability. The SRS is a quick identification tool that can be employed in the outpatient setting.
Preparation of children for elective surgery and hospitalisation: A parental perspective
Authors: Kennedy Martina , Howlin Frances
Published: July 2021

Parents play a central role in the preparation of their child for hospitalisation and surgery. This research examined the parental perspective on educating their child for an elective admission to hospital for surgery. The study employed a qualitative descriptive design and sampled eight parents from a private hospital in Dublin, Ireland, prior to their child’s discharge, after ear, nose and throat surgery. A thematic analysis revealed four themes: how parents educate themselves about surgery and hospital, factors influencing parent’s decisions on the quantity of information to share, sources of education about hospitalisation and aspects of hospitalisation not discussed by parents. Findings indicated that although the internet was used as a general source of information, parents relied more on information provided by the hospital. Parents used their child’s age, individual needs and level of autonomy to determine what information to communicate. Specific areas that parents found difficult to communicate included pain and fasting. This research highlights the need for hospitals to invest and support the delivery of parental education for children prior to surgery. Clarification of the children’s nurses’ role in the development, implementation and evaluation of education programmes that support education delivery in the home by parents is also warranted.
A novel strategy for force identification of nonlinear structures
Authors: Liu Jie , Ding Tianqi , Liu Shanhui , Hu Bingbing
Published: July 2021

Dynamic force is the key indicator for monitoring the condition of a mechanical product. These mechanical structures always encompass some nonlinear factors. Most previous studies focused on obtaining the dynamic force of linear structures. Consequently, this study focuses on the nonlinear mechanical structure, and a novel identification strategy is proposed to indirectly identify the excitation force. For the identification strategy, based on a nonlinear state-space model, a force identification equation for the nonlinear structure is built, wherein the transfer matrix consists of coefficient matrices of the nonlinear state-space model, and these coefficient matrices are calculated by a nonlinear subspace identification algorithm. Then, under the generalized cross-validation criterion, the truncated total least squares method is introduced to solve the ill-posed equation to eventually obtain the excitation force of the nonlinear structure. The identification results from two numerical simulation cases and one experimental case illustrate that the proposed identification strategy can stably and accurately identify the excitation force of nonlinear structures.
Happiness and co-creation of value: Playing the blues
Authors: Hughes Tim , Vafeas Mario
Published: July 2021

Little has been written about co-creational aspects of happiness. Happiness is generally treated in the marketing literature as an individual outcome of exchange. However, the notion of value in exchange has been challenged by service-dominant (S-D) logic. To stimulate the research discovery process, an account of co-creation of happiness is offered, based on the experience of the lead author, in playing blues music. We propose value is co-created in a context when it is perceived by an individual to be adding to their happiness/subjective well-being (SWB). Thus, the concepts of value and happiness/SWB are closely linked and interconnected. The contribution to S-D logic is in recognising the interconnectedness between value co-creation and happiness/SWB. In particular, this article draws attention to the co-creative role of the artist, in cultural ecosystems. This is relevant to the development of the field and has potentially significant implications for policy in allocating society’s resources.
Hydrodynamic characteristics of vertical and quadrant face pile supported breakwater under oblique waves
Authors: Jeya T J Jemi , Sriram V , Sundar V
Published: July 2021

This paper presents the results from a comprehensive experimental study on the Quadrant Face Pile Supported Breakwater (QPSB) in two different water depths exposed to three different oblique wave attacks. The results are compared with that for a Vertical face Pile Supported Breakwater (VPSB) for identical test conditions. The paper compares the reflection coefficient, transmission coefficient, energy loss coefficient, non-dimensional pressure, and non-dimensional run-up as a function of the relative water depth and scattering parameter. The results obtained for QPSB are validated with existing results. The salient observations show that QPSB experiences better hydrodynamic performance characteristics than the VPSB under oblique waves.
Inspection interval optimization of aircraft landing gear component based on risk assessment using equivalent initial flaw size distribution method
Authors: Lee Youngjun , Park Jongwoon , Lee Dooyoul
Published: July 2021

The nondestructive inspection interval is highly related with both system reliability and maintenance burden. Conventional inspection interval decision criteria based on the deterministic crack propagation analysis could require too much frequent inspection or sometimes occur structural failure owing to the rapid crack propagation than expected. The stochastic crack growth analysis method was proposed to compensate for the shortcomings of the deterministic analysis. This research studied the crack growth of aircraft landing gear components based on the equivalent initial flaw size distribution algorithm, and then we assessed failure risk. The calculated risk was validated using Monte-Carlo simulation, and finally, the optimum inspection interval was proposed to satisfy the US Airforce risk management criteria.
Epistemic corruption and the research impact agenda
Authors: Kidd Ian James , Chubb Jennifer , Forstenzer Joshua
Published: July 2021

Contemporary epistemologists of education have raised concerns about the distorting effects of some of the processes and structures of contemporary academia on the epistemic practice and character of academic researchers. Such concerns have been articulated using the concept of epistemic corruption. In this article, we lend credibility to these theoretically motivated concerns using the example of the research impact agenda during the period 2012–2014. Interview data from UK and Australian academics confirm that the impact agenda system, at its inception, facilitated the development and exercise of epistemic vices. As well as vindicating theoretically motivated claims about epistemic corruption, inclusion of empirical methods and material can help us put the concept to work in ongoing critical scrutiny of evolving forms of the research impact agenda.
The impact of flash glucose monitoring on glycated hemoglobin in type 2 diabetes managed with basal insulin in Canada: A retrospective real-world chart review study
Authors: Elliott Tom , Beca Sorin , Beharry Rajendra , Tsoukas Michael A , Zarruk Alexandro , Abitbol Alexander
Published: July 2021

Background:

The real-world effect of intermittently scanned continuous glucose monitoring on glucose control in type 2 diabetes treated with basal insulin is uncertain. This retrospective real-world study aimed to evaluate change in glycated hemoglobin (HbA1c) amongst adults with type 2 diabetes managed with basal insulin starting flash glucose monitoring.

Methods:

Medical records were reviewed for adults with type 2 diabetes treated with basal insulin for ⩾1 year and using FreeStyle LibreTM Flash Glucose Monitoring for ⩾3 months. Prior to device use an HbA1c 8.0%–12.0% was recorded and a further HbA1c result was recorded 3–6 months (90–194 days) after starting device use.

Results:

Medical records ( n = 91) analyzed from six Canadian diabetes centers showed HbA1c significantly decreased by 0.8% ± 1.1 (mean ± SD, [ p < 0.0001]) from mean baseline HbA1c 8.9% ± 0.9 to 8.1% ± 1.0 at 3–6 months after initiating flash glucose monitoring. HbA1c improvement was not independently associated with age, BMI, insulin use duration, or sex.

Conclusion:

This Canadian real-world retrospective study showed significantly reduced HbA1c following initiation of ﬂash glucose monitoring technology to further support management of type 2 diabetes treated with basal insulin.
Population-Based Estimates of Associations Between Child Maltreatment Types: A Meta-Analysis
Authors: Matsumoto Maya , Piersiak Hannah A. , Letterie Mia C. , Humphreys Kathryn L.
Published: July 2021

Although it is accepted that experiences of child maltreatment are multidimensional and often include several correlated but distinct experiences, many clinical and research decisions regarding exposure and treatment do not consider their potential overlap or potential independence. The purpose of this meta-analysis—using a single retrospective self-report measure, the Childhood Trauma Questionnaire (CTQ), in population-representative samples—was to investigate the magnitude and specificity of associations between forms of child maltreatment. A systematic review of studies available on PubMed, PsycINFO, and Google Scholar was conducted, resulting in the inclusion of nine journal articles, 11 independent samples, and 25,415 participants. Data were converted from Pearson correlations to Z statistics and pooled using a random effects model. All maltreatment types were positively and significantly associated. Effect sizes varied from medium to large, with (1) physical abuse and emotional abuse ( Z = 0.72, 95% CI [.48, .96]), (2) physical neglect and emotional neglect ( Z = 0.62, 95% CI [.43, .81]), and (3) emotional abuse and emotional neglect ( Z = 0.54, 95% CI [.35, .72]) demonstrating the strongest associations. These analyses provide evidence of the associations between types of child maltreatment, indicate the likelihood of shared risk, and point to characteristics that may link different types of maltreatment. These findings have important clinical implications as they may help guide comprehensive screening for associated maltreatment types as well as intervention and prevention efforts. Limitations include the relatively few studies included and those associated with the CTQ—a retrospective, self-report measure that does not account for the concurrence of experiences.
Two Decades of Abdominal Aortic Endovascular Repair With the Anatomical FiXation at the Aortic Bifurcation in a Large Single-Center Experience
Authors: Gennai Stefano , Andreoli Francesco , Saitta Giuseppe , Leone Nicola , Migliari Mattia , Covic Tea , Silingardi Roberto
Published: July 2021

Objective:

The introduction of new endograft models improved long-term results of abdominal aortic aneurysm (AAA) endovascular repair (EVAR), but most of them maintained an old and unchanged design: a short body and long legs shifting up the flow divider. This study assessed the long-term results of EVAR with unimodular endoprosthesis fixed at the aorto-iliac bifurcation (Anatomical FiXation), in a large, unselected cohort.

Materials and Methods:

In a single-center, retrospective cohort study, 623 patients selectively treated between 1999 and 2016, were analyzed. Follow-up protocol included at least a computed tomography angiography within 3 months and a duplex ultrasound and clinical exam yearly. All enrolled patients were analyzed by 2020. The primary outcomes were technical success, clinical success, and survival. Secondary outcomes included survival-free from late-open-conversion (LOC), reintervention, and endoleaks.

Results:

Median age was 74±11 years and the follow-up 93±54 months. The technical success was achieved in 99.4% and the 30-day clinical success was 98.4%. A 5-year clinical success of 97.7% was registered and at 10 years success was 96.7%. The overall survival at 1, 5, 10, and 15 years was 92.4%, 79.5%, 64.9%, and 45.5%, respectively. Six (0.98%) AAA-related death were registered, 3 caused by infection of the endograft and 3 for secondary rupture. LOCs were 9 (1.47%) and reintervention-free survival at 1, 5, 10, and 15 years were 88.4%, 78.0%, 76.2%, and 74.6%, respectively. Freedom from endoleaks was 88.8% at 1 year and 72.7% at 15 years. A total of 63 high-flow endoleaks were registered (43 type I, 7 type IIIa, 12 type IIIb, and 1 type Ib+IIIb). No migrations were recorded, and the graft limb thrombosis rate was 1.14%. From a multivariate analysis resulted that long-term clinical success appeared to be reduced in patients affected by diabetes [odds ratio (OR) 0.24; p=0.04] and in presence of calcified and thrombotic iliac accesses (OR 0.16; p=0.006).

Conclusion:

EVAR with the Anatomical FiXation was confirmed to be safe, feasible, and effective to prevent AAA rupture in the long term as well. However, the overall survival remains afflicted by cardiovascular accident. The original concept of unibody bifurcated design allowed a very low rate of graft thrombosis and zeroed the risk of migration and related reintervention.
The wargame commodity course of action automated analysis method
Authors: DeBerry William T. , Dill Richard , Hopkinson Kenneth , Hodson Douglas D. , Grimaila Michael
Published: July 2021

This research presents the wargaming commodity course of action automated analysis method (WCCAAM) – a novel approach to assist wargame commanders in developing and analyzing courses of action (COAs) through semi-automation of the military decision making process (MDMP). MDMP is a seven-step iterative method that commanders and mission partners follow to build an operational course of action to achieve strategic objectives. MDMP requires time, resources, and coordination – all competing items the commander weighs to make the optimal decision. WCCAAM receives the MDMP’s Mission Analysis phase as input, converts the wargame into a directed graph, processes a multi-commodity flow algorithm on the nodes and edges, where the commodities represent units, and the nodes represent blue bases and red threats, and then programmatically processes the MDMP steps to output the recommended COA. To demonstrate its use, a military scenario developed in the Advanced Framework for Simulation, Integration, and Modeling (AFSIM) processes the various factors through WCCAAM and produces an optimal, minimal risk COA.
Weight Loss Following Hepatopancreatobiliary Surgery. How Much is Too Much? A Retrospective Cohort Study
Authors: Zhang Betty H. , Ghazi Faisal Sanaa , Ruo Leyo , Simunovic Marko , Pinto-Sanchez Maria I. , Serrano Pablo E.
Published: July 2021

Background & Aims. Postoperative weight loss is common following hepato-pancreato-biliary (HPB) surgical resections; however, the extent of weight loss and the association with poor outcomes have not been well described. We assessed the average percentage of weight loss and risk factors associated with sustained postoperative weight loss. Materials and Methods. We enrolled patients undergoing major HPB surgical resections from 2011–2016 at a single institution. We evaluated percent change in weight postoperatively, incidence of complications, and nutritional clinical markers at 1, 3, and 6 months postoperatively compared to preoperative baseline. We used multiple logistic regression to evaluate factors associated with significant weight loss (>10% from baseline) at 3 months from surgery. Results. Among 262 patients undergoing HPB surgery, liver surgery patients lost 2.5% of baseline weight at 3 months postoperatively but regained baseline weight by 6 months. Pancreatic surgery patients lost 7.7% at 3 months and were unable to recover their baseline weights at 6 months. Forty-three (16%) patients had major postoperative complications including abdominal abscess (5.3%) and anastomotic leak (3.8%). Patients who experienced major postoperative complications had a greater percentage weight loss at 3 months compared to those without major complications: median 11% (interquartile range (IQR): 7%–15%) vs 4% (IQR: 0%–8%), P < .001. In the multivariable analysis, major postoperative complications were associated with significant weight loss at 3 months (OR 3.39, 95% CI 1.38–8.33). Conclusions. Due to the association of weight loss and major postoperative complications, patients who experience significant weight loss (>10% from baseline) may benefit from nutritional assessment for dietary intervention.
Results of a Prospective Cohort Study on Open Rives Technique of the Midline Incisional Hernia: Midline Closure and Mesh Overlap
Authors: Juvany Montserrat , Guillaumes Salvador , Hoyuela Carlos , Bachero Irene , Trias Miguel , Ardid Jordi , Martrat Antoni
Published: July 2021

Background. Rives repair has been traditionally used for large abdominal wall defects with good results on terms of recurrence. However, it is limited by the lateral border of the posterior rectus sheath. The objective of our study was to evaluate recurrence rate, midline closure and mesh overlap in patients operated on elective midline incisional hernia by open Rives retromuscular repair. Methods. This is a prospective observational study of 83 patients who underwent elective open Rives technique between January 2014 and December 2018. Main inclusion criteria were adults with a midline incisional hernia. Recurrence, midline closure and mesh overlap were determined. Results. At a median postoperative follow-up of 32 (5-59) months, 8 cases of recurrence were reported. Patients with recurrence had wider hernia defects (101 ± 52 mm vs 66 ± 36 mm, P = .014) and were repaired with wider meshes (191 ± 93 mm vs 137 ± 68 mm, P = .042). However, although it was not statistically significant, midline closure was lower (38% vs 59%), as well as the overlapping relationship between mesh area and hernia defect area (2.937:1 vs 3.732:1) on patients that developed a recurrence. Conclusions. Rives technique provides good mid-term results in a midline incisional hernia (10% of recurrence at 36 months), including wider hernias in the recurrent cohort. The authors believe that other techniques which allow midline closure and placement of bigger meshes should be considered, especially in those hernias classified as W3 on EuraHS classification (more than 10 cm on width size).
Knowledge, Attitude, and Practice of Orthopedic Manual Physical Therapists Toward Lifestyle Screening and Education: A Descriptive Study
Authors: Zollinger Jillian M. , Katuli Sozina D.
Published: July 2021

Introduction. Lifestyle-focused rehabilitation plans need to become part of the standard system of care for the treatment of chronic diseases. To achieve this goal, the KAP of rehabilitation professionals toward lifestyle medicine needs to be understood. This study investigated the niche of orthopedic manual physical therapy and is purposed as a foundational model for continued research. Method. A survey instrument was designed to investigate the KAP of orthopedic manual physical therapists toward lifestyle screening and education. Results. There were 155 participants of which 58.1-72.3% reported frequently talking to their patients about lifestyle topics, while 78.1-80.6% felt highly confident and competent while doing so. Additionally, 92.9-94.8% thought that lifestyle screening and education was important and that physical therapists should be doing it. Participants discussed exercise most frequently with their patients (96.1%) and alcohol the least (12.9%). Participants with advanced degrees (ie, PhD or DSc) had significantly higher Practice (MΔ= −3.755, P = .001) and Knowledge (MΔ= −4.14904, P = .020) ratings than those with entry-level physical therapy degrees. Conclusion. There was strong acceptance of lifestyle screening and education in orthopedic manual physical therapy with an emphasis on exercise. This study provides a foundational basis for continued research.
Research on a novel data-driven aging estimation method for battery systems in real-world electric vehicles
Authors: Hou Yankai , Zhang Zhaosheng , Liu Peng , Song Chunbao , Wang Zhenpo
Published: July 2021

Accurate estimation of the degree of battery aging is essential to ensure safe operation of electric vehicles. In this paper, using real-world vehicles and their operational data, a battery aging estimation method is proposed based on a dual-polarization equivalent circuit (DPEC) model and multiple data-driven models. The DPEC model and the forgetting factor recursive least-squares method are used to determine the battery system’s ohmic internal resistance, with outliers being filtered using boxplots. Furthermore, eight common data-driven models are used to describe the relationship between battery degradation and the factors influencing this degradation, and these models are analyzed and compared in terms of both estimation accuracy and computational requirements. The results show that the gradient descent tree regression, XGBoost regression, and light GBM regression models are more accurate than the other methods, with root mean square errors of less than 6.9 mΩ. The AdaBoost and random forest regression models are regarded as alternative groups because of their relative instability. The linear regression, support vector machine regression, and k-nearest neighbor regression models are not recommended because of poor accuracy or excessively high computational requirements. This work can serve as a reference for subsequent battery degradation studies based on real-time operational data.
Comparative outcome analysis of osseointegrated reconstruction and replantation for digital amputations
Authors: Li Andrew T. , Shepherd Angela , Gray Steven J. , Slattery Philip , Bruscino-Raiola Frank
Published: July 2021

The long-term outcomes of osseointegration for digital amputations are not well established, and it is not known whether osseointegration can achieve similar function and patient satisfaction to conventional surgical options such as replantation and microsurgical toe transfer. We compared the long-term outcomes after digital osseointegration and replantation. Six patients treated by osseointegration and seven patients treated by replantation were included, with median follow-ups of 8 years and 4.6 years, respectively. Outcomes were assessed using the Michigan Hand Outcomes Questionnaire, grip and pinch strength, range of motion, two-point discrimination, Semmes-Weinstein tests, Jebsen-Taylor Hand Function Test and clinical photography. Osseointegration was associated with poorer sensibility and range of motion than replantation; no other differences reached statistical significance. Long-term osseointegration is a safe and effective reconstructive option that can deliver excellent outcomes in appropriately selected patients.

Level of evidence: IV
Review of the treatment options for epilepsy in tuberous sclerosis complex: towards precision medicine
Authors: Schubert-Bast Susanne , Strzelczyk Adam
Published: July 2021

Tuberous sclerosis complex (TSC) is a rare genetic disorder caused by mutations in the TSC1 or TSC2 genes, which encode proteins that antagonise the mammalian isoform of the target of rapamycin complex 1 (mTORC1) – a key mediator of cell growth and metabolism. TSC is characterised by the development of benign tumours in multiple organs, together with neurological manifestations including epilepsy and TSC-associated neuropsychiatric disorders (TAND). Epilepsy occurs frequently and is associated with significant morbidity and mortality; however, the management is challenging due to the intractable nature of the seizures. Preventative epilepsy treatment is a key aim, especially as patients with epilepsy may be at a higher risk of developing severe cognitive and behavioural impairment. Vigabatrin given preventatively reduces the risk and severity of epilepsy although the benefits for TAND are inconclusive. These promising results could pave the way for evaluating other treatments in a preventative capacity, especially those that may address the underlying pathophysiology of TSC, including everolimus, cannabidiol and the ketogenic diet (KD). Everolimus is an mTOR inhibitor approved for the adjunctive treatment of refractory TSC-associated seizures that has demonstrated significant reductions in seizure frequency compared with placebo, improvements that were sustained after 2 years of treatment. Highly purified cannabidiol, recently approved in the US as Epidiolex® for TSC-associated seizures in patients ⩾1 years of age, and the KD, may also participate in the regulation of the mTOR pathway. This review focusses on the pivotal clinical evidence surrounding these potential targeted therapies that may form the foundation of precision medicine for TSC-associated epilepsy, as well as other current treatments including anti-seizure drugs, vagus nerve stimulation and surgery. New future therapies are also discussed, together with the potential for preventative treatment with targeted therapies. Due to advances in understanding the molecular genetics and pathophysiology, TSC represents a prototypic clinical syndrome for studying epileptogenesis and the impact of precision medicine.
Assessment of glenoid baseplate initial micromotion and fixation strength in reverse total shoulder arthroplasty designs using a direct shear force methodology
Authors: Parr Therese E , Anderson Jennifer K , Marionneaux Alan M. , Tokish John M , Tolan Stefan J , Hawkins Richard J , Kissenberth Michael J , DesJardins John D
Published: July 2021

Background

In a reverse total shoulder arthroplasty, the altered glenohumeral joint center of rotation subjects the glenoid baseplate to increased shear forces and potential loosening.

Methods

This study examined glenoid baseplate micromotion and initial fixation strength with the application of direct shear force in a Sawbone model. The reverse total shoulder arthroplasty systems examined were the DJO Reverse® Shoulder Prosthesis, the Exactech Equinoxe® Reverse System, and the Tornier AequalisTM Reverse Shoulder Prosthesis. Specimens were cyclically tested with increasing shear loads until 150 µm of displacement between the implant and glenoid was achieved, and subsequently until failure, classified as either 1 cm of implant/glenoid displacement or fracture.

Results

The average load withstood for the 150 µm threshold for DJO, Tornier, and Exactech was 460 ± 88 N, 525 ± 100 N, and 585 ± 160 N, respectively. The average total load at device failure for DJO, Tornier, and Exactech was 980 ± 260 N, 1260 ± 120 N, and 1350 ± 230 N, respectively.

Discussion

The Exactech implant design trended toward requiring more load to induce micromotion at each threshold and to induce device failure, most commonly seen as inferior screw pull out. This study proposes design features that may enhance fixation and suggests little risk of initial micromotion or failure during initial post-operative recovery.
Balancing String Instruction in an Instrumental Lab Setting: An Intrinsic Evaluative Case Study
Authors: Smith Tawnya D. , Hendricks Karin S. , Kos Ronald P. , Goodrich Andrew
Published: July 2021

There is an expected increase in the need to provide adequate string-specific training for non-string specialists in the future and for preservice music teachers to develop the requisite pedagogical content knowledge to teach a variety of instruments. A multiyear instrumental lab ensemble university course was designed to help preservice music teachers integrate knowledge and skills in various instrument- and ensemble-specific areas. The purpose of this intrinsic evaluative study was to determine the extent to which the new course was successful toward these aims. Data included interviews of students and instructors, observations of lab classes, and reflective journals of teaching faculty and two external observers. Data were coded and then analyzed using the program goal statements found in the course syllabus. Findings indicated that students considered the lab format more authentic to their teacher preparation than their previous coursework, and that performance and pedagogy skills on secondary instruments elevated more rapidly than anticipated. Recommendations include the need for more explicit connection between course readings and lab activities, and improved guidelines for course teaching assistants.
Hidden Ground: Exploring an Approach to Educational Music for Strings
Authors: Giesbrecht Maia , Andrews Bernard W.
Published: July 2021

This article presents the findings of a study that explored the composition of Canadian educational music. Particularly, the authors focus on the analyses of composers’ scores on creating new string compositions for young musicians within the New Sounds of Learning Project. On a macro level, the composers predominantly composed multiple movements (three to four), using single section (A), binary (AB), ternary, or variation forms (A, A’, A”, A”’, etc.), and they adopted simple meters throughout. At the micro-level, the majority of the compositions also included a technical element that was used to further skill development, that is, lack of meter to focus attention, syncopation to develop rhythmic fluency, interactive rhythms between parts to promote player coordination, modular structure to address varied skill levels, or free rhythm to promote imaginative thinking. The findings will be of interest to those members of the music profession who promote or would like to promote the dissemination of new music for strings within educational settings in Canadian music classrooms.
Status of Band and Orchestra Programs in North Carolina
Authors: Miller David S. , MacLeod Rebecca B. , Walter Jennifer S.
Published: July 2021

The purpose of this study was to examine K–12 instrumental music education in North Carolina. Specifically, we investigated course offerings, teacher demographics, teaching responsibilities, and music program funding. We administered a survey to the members of the North Carolina Music Educators Association listserv who indicated band or orchestra as their teaching area. Participants identified themselves as teachers of orchestra ( n = 44), band ( n = 173), or a hybrid of both ( n = 17). Of schools that offered instrumental music, 95% offered band and 36% offered orchestra. More than 20% of orchestra teachers were “very likely to retire within 5 years.” The majority of teachers relied on fundraising to provide adequate music education for students. Results of this study were analyzed and compared to national averages reported in the Give a Note Foundation’s 2017 report: The Status of Music Education in United States Public Schools. Implications for orchestra teachers, music programs, music teacher preparation curriculum, and future research are discussed.
Clinical associations with stage B heart failure in adults with type 2 diabetes
Authors: Gulsin Gaurav S. , Brady Emer , Marsh Anna-Marie , Squire Gareth , Htike Zin Z. , Wilmot Emma G. , Biglands John D. , Kellman Peter , Xue Hui , Webb David R. , Khunti Kamlesh , Yates Tom , Davies Melanie J. , McCann Gerry P.
Published: July 2021

Background:

There is a high prevalence of asymptomatic (American Heart Association Stage B) heart failure (SBHF) in people with type 2 diabetes (T2D). We aimed to identify associations between clinical characteristics and markers of SBHF in adults with T2D, which may allow therapeutic interventions prior to symptom onset.

Methods:

Adults with T2D from a multi-ethnic population with no prevalent cardiovascular disease [ n = 247, age 52 ± 12 years, glycated haemoglobin A1c (HbA1c) 7.4 ± 1.1% (57 ± 12 mmol/mol), duration of diabetes 61 (32, 120) months] underwent echocardiography and adenosine stress perfusion cardiovascular magnetic resonance imaging. Multivariable linear regression analyses were performed to identify independent associations between clinical characteristics and markers of SBHF.

Results:

In a series of multivariable linear regression models containing age, sex, ethnicity, smoking history, number of glucose-lowering agents, systolic blood pressure (BP) duration of diabetes, body mass index (BMI), HbA1c, serum creatinine, and low-density lipoprotein (LDL)-cholesterol, independent associations with: left ventricular mass:volume were age (β = 0.024), number of glucose-lowering agents (β = 0.022) and systolic BP (β = 0.027); global longitudinal strain were never smoking (β = −1.196), systolic BP (β = 0.328), and BMI (β = −0.348); myocardial perfusion reserve were age (β = −0.364) and male sex (β = 0.458); and aortic distensibility were age (β = −0.629) and systolic BP (β = −0.348). HbA1c was not independently associated with any marker of SBHF.

Conclusions:

In asymptomatic adults with T2D, age, systolic BP, BMI, and smoking history, but not glycaemic control, are the major determinants of SBHF. Given BP and BMI are modifiable, these may be important targets to reduce the development of symptomatic heart failure.
What being an owner can also mean: A socio-anthropological study on the development of a forgotten relationship to objects
Authors: Dabadie Isabelle , Robert-Demontrond Philippe
Published: July 2021

In a context of ecological crisis, new economic models have developed based on the replacement of ownership by access. While they have been studied at length, the very idea of ownership, which is supposed to be abandoned in this process, has rarely been questioned. This is the aim of our research, which investigates the meanings of the concept of ownership for consumers. A socio-anthropological investigation and an ethnographic study on various sharing systems (for houses, boats and clothes) reveals the development of a relationship to ownership, which differs from the one that prevails in the society. In this paradigm, which questions possessive individualism, the owner appears as the ‘custodian’ of his possessions. The identification of his expectations opens managerial and societal perspectives to build the offers that will enable him to fulfil this role.
Cardiac MRI Detection of Left Ventricular Aneurysm in Children After Ventricular Assist Device Explantation
Authors: Mahendran Arjun K. , Gupta Dipankar , Bleiweis Mark S. , Chandran Arun
Published: July 2021

Consensus is lacking regarding screening for complications such as ventricular aneurysms after ventricular assist device explant. We report two pediatric patients, status-post explantation, who developed true left ventricular apical aneurysms diagnosed by cardiac magnetic resonance imaging. Imaging also suggested laminated thrombus versus postoperative changes which were treated with antiplatelet therapy.
Eye Health, COVID-19, and the Occupational Health Professional: Round Table
Authors: Gallagher Susan , Clasing Jay , Hall Edward , Hammond Stephanie , Howard Gayle , Mohrmann Todd , Vaccaro Jayme Taormina
Published: July 2021

Background:

Eye health has garnered increased attention since the COVID-19 pandemic. This Round Table explored the impact mask wearing, delays in eye examinations, and increased screen time have on vision and ultimately the worker.

Methods:

Leading experts in the areas of occupational health, risk management, eye health, and communication were identified and invited to participate in a Round Table discussion. Questions posed to experts were based on literature that addressed eye health, such as mask wearing, communication and managing expectations when accessing professional eye health appointments, and increased screen time.

Findings:

Experts agreed that eye health considerations must be in place. These considerations should address not only clinical care of the patient but ways to protect workers from occupational injury associated with the eye.

Conclusion/Application to practice:

The occupational health professional is a key resource for assessment and training that pertains to eye health.