bluuebunny/crossref_metadata_2025 huggingface dataset:
Toward Quantitative and Operator-independent Quasi-static Ultrasound Elastography: An Ex Vivo Feasibility Study
Authors: Selladurai Sathiyamoorthy , Verma Abhilash , Thittai Arun K.
Published: May 2020

It is known that the elasticity of liver reduces progressively in the case of diffuse liver disease. Currently, the diagnosis of diffuse liver disease requires a biopsy, which is an invasive procedure. In this paper, we evaluate and report a noninvasive method that can be used to quantify liver stiffness using quasi-static ultrasound elastography approach. Quasi-static elastography is popular in clinical applications where the qualitative assessment of relative tissue stiffness is enough, whereas its potential is relatively underutilized in liver imaging due to lack of local stiffness contrast in the case of diffuse liver disease. Recently, we demonstrated an approach of using a calibrated reference layer to produce quantitative modulus elastograms of the target tissue in simulations and phantom experiments. In a separate work, we reported the development of a compact handheld device to reduce inter- and intraoperator variability in freehand elastography. In this work, we have integrated the reference layer with a handheld controlled compression device and evaluate it for quantitative liver stiffness imaging application. The performance of this technique was assessed on ex vivo goat liver samples. The Young’s modulus values obtained from indentation measurements of liver samples acted as the ground truth for comparison. The results from this work demonstrate that by combining the handheld device along with reference layer, the estimated Young’s modulus value approaches the ground truth with less error compared with that obtained using freehand compression (8% vs. 15%). The results suggest that the intra- and interoperator reproducibility of the liver elasticity also improved when using the handheld device. Elastography with a handheld compression device and reference layer is a reliable and simple technique to provide a quantitative measure of elasticity.
Critical celebrations of independent media centers 20 years on
Authors: Hamilton James F
Published: May 2020

This article briefly summarizes the general trajectory of IMCs over the past 20 years since their emergence in 1999. Despite their decline since the mid-2000s, this article also makes a case for their continued relevance for radical cultural activism.
In Situ Simulation to Assess Pediatric Tracheostomy Care Safety: A Novel Multicenter Quality Improvement Program
Authors: Shah Sharan J. , Cusumano Cristen , Ahmed Sadia , Ma Anthony , Jafri Farrukh N. , Yang Christina J.
Published: May 2020

Objectives

Our objectives were (1) to use in situ simulation to assess the clinical environment and identify latent safety threats (LSTs) related to the management of pediatric tracheostomy patients and (2) to analyze the effects of systems interventions and team factors on LSTs and simulation performance.

Methods

A multicenter, prospective study to assess LSTs related to pediatric tracheostomy care management was conducted in emergency departments (EDs) and intensive care units (ICUs). LSTs were identified through equipment checklists and in situ simulations via structured debriefs and blinded ratings of team performance. The research team and unit champions developed action plans with interventions to address each LST. Reassessment by equipment checklists and in situ simulations was repeated after 6 to 9 months.

Results

Forty‐one LSTs were identified over 21 simulations, 24 in the preintervention group and 17 in the postintervention group. These included LSTs in access to equipment (ie, availability of suction catheters, lack of awareness of the location of tracheostomy tubes) and clinical knowledge gaps. Mean equipment checklist scores improved from 76% to 87%. Twenty‐one unique teams (65 participants) participated in the simulations. The average simulation score was 6.19 out of 16 points.

Discussion

In situ simulation is feasible and effective as an assessment tool to identify latent safety threats and thus measure the system‐level performance of a clinical care environment.

Implications for Practice

In situ simulation can be used to identify and reassess latent safety threats related to pediatric tracheostomy management and thereby support quality improvement and educational initiatives.
Lessons Learned From a Single‐Surgeon Experience of More Than 1700 Parathyroidectomies
Authors: Terris David J. , Eltelety Ahmad , Zimmerman Zachary , Edelmayer Luke
Published: May 2020

Objective

To define critical elements that contribute to successful parathyroidectomy based on a high‐volume single‐surgeon experience and explore learning curve characteristics.

Study Design

Systematic analysis of prospectively maintained quality assurance database.

Setting

Academic tertiary care endocrine surgery practice.

Subjects and Methods

In total, 4737 consecutive patients who underwent thyroid or parathyroid surgery from 2004 to 2020 were identified. Demographic data acquisition was undertaken on a subset of these patients who had initial surgery for primary hyperparathyroidism during the academic years 2005 to 2018. Patients with renal or syndromic hyperparathyroidism and those undergoing reoperative surgery were excluded.

Results

From 1710 patients who underwent parathyroid surgery, 1082 met inclusion criteria in order to focus on a homogeneous data set. These patients had a mean age of 60.1 ± 12.5 years and 76.4% were female. The overall cure rate was 98.3%, reflecting a success rate that increased from 95.5% during the first 200 cases to 99.7% over the final 300 cases. The complication rate was 1.7%. Over 2 decades, the patient phenotype evolved toward milder disease and smaller adenomas. A learning curve of 200 cases was required to become a proficient parathyroid surgeon; to achieve exceptional results required several hundred additional cases. Parathyroid surgery represents a higher proportion of an endocrine surgery practice than previously (54.0% in 2019 compared with 25.5% in 2004).

Conclusion

A focused practice dedicated to endocrine surgery yields surgical volumes exceeding 500 cases annually. There has been a steady shift toward parathyroid surgery. A lengthy learning curve can be shortened by pursuit of several specific strategies that are outlined in detail.
Evolving Management of COVID‐19: A Multi‐institutional Otolaryngology Perspective
Authors: Wickemeyer Johanna L. , Billings Kathleen R. , Valika Taher S.
Published: May 2020

Objective

To provide evolving information on active protocols regarding inpatient, outpatient, procedural, and surgical case management taking place in otolaryngology practices in response to COVID‐19.

Study Type

Cross‐sectional multi‐institutional survey.

Methods

An online survey of 55 otolaryngology departments across North America.

Results

As of March 25, 2020, almost all (n = 53 of 55, 96.3%) otolaryngology departments had canceled elective cases and were performing only urgent consults. Most residents continued to participate in operative cases (n = 45 of 49, 91.8%) and take call (n = 48 of 50, 96.0%). Of the respondents, 27 of 29 (93.1%) stated that they were deferring nonemergent tracheostomy procedures for the time being. The use of personal protective equipment followed a general trend of an increasing level of protection with an increased risk of the procedure; most (n = 49 of 54, 90.7%) incorporated N95 mask usage for bedside/clinic examinations with flexible laryngoscopy. Powered air‐purifying respirators and N95 masks were used mainly for procedures involving the mucosal surfaces.

Discussion

Due to the high viral density in the nasal cavity and nasopharynx of patients with COVID‐19, basic examinations and common otolaryngology procedures place practitioners at high risk of exposure. Although there is variability in practice among otolaryngologists across North America in managing the COVID‐19 outbreak, most are primarily seeing urgent ambulatory and inpatient consultations. Most are also incorporating personal protective equipment appropriate to the level of transmission across mucous membranes.

Implications for Practice

In these rapidly evolving times, it is helpful to find solidarity and assurance among health care providers. Current data aimed to provide (1) perceived methods regarding the safe care of otolaryngology patients and (2) updated practice patterns at a national level.
Legal Exclusion, Civic Exclusion: How Legal Status Stratifies Latino Immigrants’ Civic Engagement
Authors: Lai Tianjian
Published: May 2020

Unlike many other sociopolitical activities in the United States, civic engagement is not restricted by legal status and is often the initial and primary form of political action available to immigrants. Few studies, however, have disaggregated the impact of legal status on immigrants’ civic participation, despite civic engagement’s significance for immigrant incorporation and despite growing evidence of the stratifying effects of legal categories. Using Wave 1 of the Los Angeles Family and Neighborhood Survey, I nuance theories of legal status stratification by showing where legal status matters for Latino immigrants’ civic engagement and where it does not. Undocumented immigrants, I show, are significantly less likely to participate in general civic organizations, such as community and ethnic organizations, relative to documented immigrants. Likewise, undocumented mothers with undocumented children are less likely to volunteer in schools or participate in parent-teacher associations, compared to both documented mothers and undocumented mothers with documented children. By contrast, legal status does not stratify membership in religious institutions. Moreover, I theorize that undocumented immigrants’ lower levels of general civic engagement are partially mediated by access to US education, a significant site for immigrants’ civic development. This article informs understandings of legal status stratification and immigrant social incorporation.
Happy with Your Capabilities? Valuing ICECAP-O and ICECAP-A States Based on Experienced Utility Using Subjective Well-Being Data
Authors: Himmler Sebastian , van Exel Job , Brouwer Werner
Published: May 2020

Background. The ICECAP-O and the ICECAP-A are validated capability well-being instruments. To be used in economic evaluations, multidimensional instruments require weighting of the distinguished well-being states. These weights are usually obtained through ex ante preference elicitation (i.e., decision utility) but could also be based on experienced utility. Objective. This article describes the development of value sets for ICECAP-O and ICECAP-A based on experienced utility and compares them with current decision utility weights. Methods. Data from 2 cross-sectional samples corresponding to the target groups of ICECAP-O and ICECAP-A were used in 2 separate analyses. The utility impacts of ICECAP-O and ICECAP-A levels were assessed through regression models using a composite measure of subjective well-being as a proxy for experienced utility. The observed utility impacts were rescaled to match the 0 to 1 range of the existing value set. Results. The calculated experienced utility values were similar to the decision utility weights for some of the ICECAP dimensions but deviated for others. The largest differences were found for weights of the ICECAP-O dimension enjoyment and the ICECAP-A dimensions attachment and autonomy. Conclusions. The results suggest a different weighting of ICECAP-O and ICECAP-A levels if experienced utility is used instead of decision utility.
Perceived Market Risk in New Ventures: A Study of Early-Phase Business Angel Investment Screening
Authors: Frias Kellilynn M. , Popovich Deidre L. , Duhan Dale F. , Lusch Robert F.
Published: May 2020

Business angels are vital sources of funding for new ventures. Yet, acquiring business angel support is difficult. Typically organized in professional networks, business angels collectively evaluate and deliberate about new ventures to determine their worthiness of support. One factor deemed to be critical during this evaluation is market risk. Yet, limited research in Macromarketing examines market risk. To our knowledge, no previous study examines market risk in capital markets, nor do they study angel financing. Neglecting to study angel financing is particularly problematic for macromarketing because this type of finance is much more prominent than venture capital in supporting new ventures. To fill this gap, we begin by exploring the literature by Lusch (and coauthors) linking marketing and capital markets as well as studies of market risk. We then craft fictitious angel investment proposals to measure market risk assessments by business angels and entrepreneurs. We ask which factors impact market risk during the early-phases of the investment screening process (when market risk is weighted more heavily) and identify whether these factors are evaluated differently by entrepreneurs versus business angels. Our findings reveal that commercialization capability, technological compatibility, and intellectual property rights enforceability influence perceived market risk and that entrepreneurs and business angels view these factors significantly differently. We then offer directions for further research related to this study and other work of Lusch. Finally, we suggest practical implications for use by business angels and entrepreneurs.
Actuated Traffic Signal Performance Evaluation along Arterials using Wi-Fi Travel Time Samples and High-Resolution Traffic Signal Events Data
Authors: Li Pengfei (Taylor) , Chowdhury Farzana R. , Wang Peirong (Slade) , Imtiaz Sayem Mohammad
Published: May 2020

Understanding traffic progression on arterials is critical for traffic signal control and urban traffic management. Traffic conditions are highly dynamic and evolve over time. Therefore, it is necessary to evaluate the arterial’s performance periodically to determine how well a traffic signal system is functioning. Arterial performance is conventionally evaluated based on travel time/speed collected via the probe vehicles. New approaches based on high-resolution traffic signal events have been proposed by a group at Purdue University, based on the Purdue Coordination Diagrams (PCDs). Both traditional arterial travel times/speeds and the PCDs can effectively reflect the level of traffic progression on arterials, while some practical questions have been raised about how to synthesize these two methods. The framework proposed in this paper integrates two types of performance measures by defining new multi-intersection coordination diagrams to examine traffic signal performance. The multi-intersection coordination diagram under different speeds can provide a straightforward tool for informed offset adjustments of actuated traffic signal coordination. In contrast, the state-of-the-practice traffic coordination performance analysis relies on fixed timings and empirical fine-tuning in the field. It is expected that these efforts can provide new insights to practitioners on how to use emerging traffic data better to improve the performance of actuated traffic signal operations on arterials.
Stigma in Class: Mental Illness, Social Status, and Tokenism in Elite College Culture
Authors: Billings Katie R.
Published: May 2020

The majority of mental illness on college campuses remains untreated, and mental illness stigma is the most common reason for not seeking mental health treatment. Compared with affluent students, working-class students are at greater risk of mental illness, are less likely to seek treatment, and hold more stigmatized views toward people with mental illness. Research on college culture suggests that elite contexts may be associated with greater stigmatization of illness. This study asks how social status and college context together predict students’ mental health attitudes. A survey of Ivy and non-Ivy League undergraduates ( n = 757) found that lower status students’ perceptions of themselves as status minorities may be responsible for greater stigmatization of mental illness in elite contexts. Elite academic institutions bolster cultures of individualism and perfectionism, which encourage students to adopt stigmatizing views. In addition, these processes may be even more harmful to lower status students who are underrepresented on their elite college campuses. Results suggest that elite colleges need to evaluate the negative effects their culture and norms have on students’ mental health attitudes, and that increasing socioeconomic diversity may improve lower status students’ mental health attitudes.
A Public Health Approach to Negative News Media: The 3-to-1 Solution
Authors: VanderWeele Tyler J. , Brooks Arthur C.
Published: May 2020

There is clear evidence that the prevalence of negative media reporting has increased substantially over the past years. There is evidence that this negative reporting adversely affects social interactions, and thereby also health and well-being outcomes. Given the wide reach of negative media reporting and the contagion of such reporting and the resulting interactions, the effects on health are arguably substantial. Moreover, there is little incentive at present for media outlets to change practices. A commitment of news outlets to report one positive story for every 3 negative stories, and of news consumers to restrict attention to outlets that do, could dramatically alter practices and, consequently, population health.
Talking Shit, Egos, and Tough Skin: Humor Among Elite Black Men
Authors: Guzman Joseph A.
Published: May 2020

Extant research considers humor integral to the Black experience. Previous work on the topic, however, mainly focuses on humor among lower-class Blacks and remains disconnected from broader sociological research on humor and small group culture. Drawing on semistructured, in-depth interviews with 29 members and over 30 months of participant observation this article explores humor in an elite Black men’s social club. “Talking shit” is central to sociability among members, signaling belongingness (having “tough skin") and cementing cohesion on interpersonal and group levels through the deconstruction of egos. By finding amusement in the ambiguities of social identity members interpret its boundaries and articulate feelings in the process of creating and sustaining a culture of hilarity. Ultimately, the analysis illuminates how social identity shapes the content and processes of humor within small group culture.
Presentation, Diagnostic Imaging, and Clinical Outcome of Conventional Ameloblastoma in Dogs
Authors: Tjepkema Jennifer , Bell Cynthia M. , Soukup Jason W.
Published: May 2020

A noninductive tumor of odontogenic epithelium occurs within the tooth bearing regions of the jaw in dogs and fits the conventional definition of ameloblastoma, which is distinct from, and less common than, canine acanthomatous ameloblastoma. In order to clarify the clinical and radiological features of this uncommon odontogenic tumor in dogs, we performed a retrospective study of 20 dogs that were diagnosed between 2007 and 2015. Follow-up information was obtained for 17 of 20 dogs. The study group of dogs showed no apparent age, breed, or gender predilection. Conventional ameloblastoma is typically slow growing, well demarcated, and locally destructive. Tumors most commonly occurred as a mass or focal bony swelling within the maxilla (13/20) or mandible (7/20). Based on cases with available diagnostic imaging, as either dental radiographs or computed tomographic images, the tumors were usually intraosseous and caused mixed lytic/proliferative bone changes. Nevertheless, conventional ameloblastomas did not aggressively infiltrate adjacent tissues and recurrence was not observed within the study group, even in patients with narrow surgical margins or treatment by cyst enucleation.
Rethinking Situated Learning: Participation and Communities of Practice in the UK Fire and Rescue Service
Authors: Brooks James , Grugulis Irena , Cook Hugh
Published: May 2020

Legitimate peripheral participation is the bedrock of situated learning. It involves the novice or newcomer acquiring skills through work in a community of practice (CoP). It is generally assumed that CoP learning involves novices moving in a centripetal manner from periphery to core, gaining skills and knowledge from established workers before becoming full members of the community. This article draws on qualitative research in Northern Fire, one of the UK’s largest fire and rescue services, to challenge the idea that novices’ learning progression is linear and sequential, highlighting their fundamental importance in CoPs. It argues that learning is radial, with established workers learning from novices, just as novices learn from established workers. The novices contributed to group dynamics passively, simply by being there; and actively, through their own skills and theoretical knowledge. When funding cuts and austerity curtailed recruitment, the absence of novice firefighters hindered CoP learning.
Robust proportional incremental nonlinear dynamic inversion control of a flying-wing tailsitter
Authors: Yang Yunjie , Wang Xiangyang , Zhu Jihong , Yuan Xiaming , Zhang Xiaojun
Published: May 2020

Tailsitter unmanned aerial vehicles are utilized extensively nowadays since they merge advantages of both fixed-wing unmanned aerial vehicles and rotary-wing unmanned aerial vehicles. However, their attitude control suffers from unknown nonlinearities and disturbances due to the wide flight envelope. To solve the problems, a robust attitude controller based on a newly designed flying-wing tailsitter is proposed in this paper. By employing the angular acceleration feedback to compensate unmodeled dynamics, the proportional incremental nonlinear dynamic inversion control law is first developed. The proportional incremental nonlinear dynamic inversion strengthens the conventional nominal gain incremental nonlinear dynamic inversion with a proportional term to reflect the change of the angular acceleration more directly. Therefore, the tailsitter has a quicker response and performs better in suppressing model uncertainties and external disturbances. Since the angular acceleration is difficult to measure in practice, an angular acceleration estimation method is then established to provide accurate signals for the proportional incremental nonlinear dynamic inversion. The signals are derived as complementary results of model prediction method and direct differential method. Theoretical analysis and systematic simulations are conducted to corroborate the effectiveness of the developed estimation method as well as the robustness of the proposed controller.
Learning Novel Skills From Iconic Gestures: A Developmental and Evolutionary Perspective
Authors: Bohn Manuel , Kordt Clara , Braun Maren , Call Josep , Tomasello Michael
Published: May 2020

Cumulative cultural learning has been argued to rely on high-fidelity copying of other individuals’ actions. Iconic gestures of actions have no physical effect on objects in the world but merely represent actions that would have an effect. Learning from iconic gestures thus requires paying close attention to the teacher’s precise bodily movements—a prerequisite for high-fidelity copying. In three studies, we investigated whether 2- and 3-year-old children ( N = 122) and great apes ( N = 36) learn novel skills from iconic gestures. When faced with a novel apparatus, participants watched an experimenter perform either an iconic gesture depicting the action necessary to open the apparatus or a gesture depicting a different action. Children, but not great apes, profited from iconic gestures, with older children doing so to a larger extent. These results suggest that high-fidelity copying abilities are firmly in place in humans by at least 3 years of age.
From mutual awareness to collaboration: Academic libraries and autism support programs
Authors: Anderson Amelia
Published: May 2020

Libraries are designed to support the communities and populations they serve through access to services and materials. Along with supporting faculty and staff, academic libraries work to serve the needs of their students. Academic libraries can be a welcoming environment for college students in general, and some studies are beginning to show that this is particularly true for autistic students, who use the library to pursue special interests, as an escape from a bustling sensory environment on campus, and, of course, for studying and pursuing academic success. Through semi-structured interviews, this study sought to better understand how academic librarians are working together with autism student support programs to provide more targeted services and support. In this study, the researcher reached out to autism support programs for college students across the USA to learn about library involvement. The findings suggest that academic librarians are interested in better understanding the preferences of autistic students and collaborating across campus to provide more inclusive services. Additionally, administrators of autism support programs demonstrated interest in learning more about how the library could be a strong collaborator, suggesting broad practical implications for the results of this study.
Defending the digital: Awareness of digital selectivity in historical research practice
Authors: Coburn Jon
Published: May 2020

Existing research offers fearful conclusions on the use of online archival collections, finding that historians ignore and overlook the limitations of digital sources. However, an attitudinal case study at Newcastle University contradicts this consensus. This article discusses this study’s detailed findings, determining that historians and library professionals demonstrate abundant and nuanced awareness of issues relating to ‘digital selectivity’. Nevertheless, the interviewees suggested that this does not radically undermine their practice. The study also revealed compelling aspects of digital selectivity not currently observed in existing research, including the effects of career stage and the importance of cooperation with library professionals. While the existing literature provides appropriate and prudent concerns, it lacks tangible evidence pointing to a widespread phenomenon of poor digital historical practice. The article closes by recommending further research into historians’ digital information-seeking behaviour, but argues that standardized metadata practices must come first. Limitations, including the absence of rigorous quantitative data, must be resolved before a fuller appreciation for digital historical practice is developed.
Estimation of causal effects of multiple treatments in observational studies with a binary outcome
Authors: Hu Liangyuan , Gu Chenyang , Lopez Michael , Ji Jiayi , Wisnivesky Juan
Published: May 2020

There is a dearth of robust methods to estimate the causal effects of multiple treatments when the outcome is binary. This paper uses two unique sets of simulations to propose and evaluate the use of Bayesian additive regression trees in such settings. First, we compare Bayesian additive regression trees to several approaches that have been proposed for continuous outcomes, including inverse probability of treatment weighting, targeted maximum likelihood estimator, vector matching, and regression adjustment. Results suggest that under conditions of non-linearity and non-additivity of both the treatment assignment and outcome generating mechanisms, Bayesian additive regression trees, targeted maximum likelihood estimator, and inverse probability of treatment weighting using generalized boosted models provide better bias reduction and smaller root mean squared error. Bayesian additive regression trees and targeted maximum likelihood estimator provide more consistent 95% confidence interval coverage and better large-sample convergence property. Second, we supply Bayesian additive regression trees with a strategy to identify a common support region for retaining inferential units and for avoiding extrapolating over areas of the covariate space where common support does not exist. Bayesian additive regression trees retain more inferential units than the generalized propensity score-based strategy, and shows lower bias, compared to targeted maximum likelihood estimator or generalized boosted model, in a variety of scenarios differing by the degree of covariate overlap. A case study examining the effects of three surgical approaches for non-small cell lung cancer demonstrates the methods.
SDF-1/CXCR4 Augments the Therapeutic Effect of Bone Marrow Mesenchymal Stem Cells in the Treatment of Lipopolysaccharide-Induced Liver Injury by Promoting Their Migration Through PI3K/Akt Signaling Pathway
Authors: Xiu Guanghui , Li Xiuling , Yin Yunyu , Li Jintao , Li Bingqin , Chen Xianzhong , Liu Ping , Sun Jie , Ling Bin
Published: May 2020

Mesenchymal stem cells (MSCs) are thought to have great potential in the therapy of acute liver injury. It is possible that these cells may be regulated by the stromal cell-derived factor-1 (SDF-1)/CXC chemokine receptor-4 (CXCR4) signaling axis, which has been shown to promote stem cells migration in the inflammation-associated diseases. However, the effects of SDF-1/CXCR4 axis on the MSCs-transplantation-based treatment for acute liver injury and the underlying mechanisms are largely unknown. In this study, we sought to determine whether SDF-1/CXCR4 would augment the therapeutic effect of bone marrow mesenchymal stem cells (BMSCs) by promoting their migration, which may result from activating the phosphoinositide 3-kinase (PI3K)/Akt signaling pathway, in a rat acute liver injury model induced by lipopolysaccharide (LPS). We found that BMSCs transplantation markedly attenuated liver injury and improved the survival of LPS-treated rats. Of interest, overexpression of CXCR4 in BMSCs could substantially promote their migration both in vitro and in vivo, and result in even better therapeutic effects. This might be attributed to the activation of PI3K/Akt signaling pathway in BMSCs that is downstream of CXCR4, as demonstrated by the use of the CXCR4 antagonist AMD3100 and PI3K pathway inhibitor LY294002 assays in vitro and in vivo. Together, our results unraveled a novel molecular mechanism for the therapeutic effect of BMSCs for the treatment of acute liver injury, which may shed a new light on the clinical application of BMSCs for acute liver failure.
Montenegrin-British military cooperation against the French in the Bay of Kotor (1813-1814)
Authors: Knežević Saša , Vukićević Boris
Published: May 2020

During the Napoleonic Wars on the eastern coast of the Adriatic, a British squadron established a close military cooperation with the Montenegrins. The aim of the British was to liberate Boka Kotorska (the Bay of Kotor/Bocca di Cattaro) from the French, and the goal of the Montenegrin Metropolitan Petar I was to unite Boka with Montenegro. The war events in Bay of Kotor are the subject of this article. The Memoirs and Letters of the British squadron’s Commander William Hoste were extensively used, as well as the diary of the French General Gauthier and historical sources from the Montenegrin archives.
Role of Mediator in Examining the Influence of Antecedents of Mobile Wallet Adoption on Attitude and Intention
Authors: Chawla Deepak , Joshi Himanshu
Published: May 2020

The purpose of this article is to explore the mediating role of perceived usefulness, trust and attitude on a user’s intention towards use of mobile wallets in India. While mediation has been studied by earlier researchers in the context of online commerce, mobile banking, short message service (SMS) banking, mobile money, etc., not many studies exist in the context of mobile wallets. Considering the potential of mobile wallets in India, previous relationships from the theories of technology adoption like technology acceptance model (TAM) and unified theory of acceptance and use of technology (UTAUT) were adapted to investigate the determinants of user attitude and intention towards mobile wallet adoption. Based on data from 744 respondents collected through a survey, partial least squares (PLS) structural equation modelling was used to test the research model. Convenience sampling was used to select the respondents. The results revealed that out of the nine paths wherein mediation was examined, in two paths full mediation was found while it was partial in the remaining cases. This study extends research in explaining attitude and intention through multiple mediating relationships. The implications for research and practice and future research directions are discussed.
Prevalence and predictors of music performance anxiety in adolescent learners: Contributions of individual, task-related and environmental factors
Authors: Papageorgi Ioulia
Published: May 2020

Currently, no formal music performance anxiety (MPA) prevalence rates exist for children and adolescent musicians. Factors contributing to distinct MPA experiences (maladaptive versus adaptive) are also not clear and there is a lack of research investigating cultural variability in MPA experiences. The study aimed to investigate the prevalence of MPA and factors affecting MPA levels in adolescent musicians. Comparisons between sexes (boys, girls), age groups (12–15, 16–19 years) and nationalities (Cypriot, British) were conducted to elucidate the association between sex and MPA, explore the developmental trajectory of MPA and investigate cultural variability in its prevalence and manifestation. Profiles of musicians experiencing high, moderate and low MPA were examined to investigate discriminating characteristics. A sample of 410 musicians in Cyprus and the United Kingdom completed the Young Musicians’ Performance Questionnaire, including the Adolescent Musicians’ Performance Anxiety Scale (AMPAS). Overall, 11% of participants experienced high levels of MPA. Anxiety was affected by the cultural context as group differences and different developmental trajectories were observed in the two nationalities. Girls experienced higher MPA levels than boys, although when sex was included in a hierarchical regression with other variables, it was not a significant predictor. Approximately 60% of the variance in MPA was explained by variables that related to individual characteristics affecting susceptibility to anxiety, task-efficacy, and the performance environment. Highly anxious participants were more likely to experience maladaptive MPA. The findings support the development of personalized and culturally responsive interventions addressing individual needs on the basis of distinct musician profiles.
What Makes an Entrepreneurship Study Entrepreneurial? Toward A Unified Theory of Entrepreneurial Agency
Authors: McMullen Jeffery S. , Brownell Katrina M. , Adams Joel
Published: May 2020

Calls for greater contextualization have been powerful in motivating research and knowledge creation about entrepreneurship. However, unless counter-balanced with attempts to identify the field’s conceptual core, these efforts have the potential to devolve into hyper-contextualization, exposing the field to fragmentation, loss of consensus, and possible disintegration. We identify five elements of entrepreneurial agency common across eight subcommunities of entrepreneurship but emphasized differently in each. By conceiving of entrepreneurship as structural transformation, we explain why some agents succeed at transforming social structures via entrepreneurial action. We conclude with some first steps toward the development of a unified theory of entrepreneurial agency.
Psychosocial Interventions for Adolescents and Young Adults With Cancer: An Integrative Review
Authors: Thornton Clifton P. , Ruble Kathy , Kozachik Sharon
Published: May 2020

Background: Adolescents and young adults with cancer sit in a precarious position facing an increasing cancer incidence while incidence in other age groups has been declining. A cancer diagnosis at this age imposes undue distress in a demographic with limited coping resources creating psychosocial needs that differ from children and older adults. Addressing psychosocial needs early in the cancer trajectory is postulated as an approach to address distress, improve quality of life, and promote optimal outcomes from therapy. The purpose of this review is to identify current successful approaches to psychosocial care in adolescents and young adults receiving therapy for cancer. Method: An integrative review of publications identified through six relevant databases was conducted. Thematic analysis was performed to identify types of interventions followed by assessment of publication level of evidence, quality, and a critique of the effectiveness of interventions. Findings: A total of 6,292 articles were identified and 17 met inclusion criteria for this review. Thematic analysis and critique identified six themes for intervention approaches with mixed outcomes: creative expression, promoting peer interactions, individual coaching, employing technology, promoting physical activity, and clinical interactions. Discussion: Adolescent and young adult psychosocial needs while receiving treatment are complex and best addressed with the involvement of an interdisciplinary team. Effective interventions include those that have been tailored to the patient and consider the individual’s developmental stage. Interventions that promote autonomy and decision making, provide privacy, are executed in individual sessions, and facilitate social/peer interactions have been more successful in improving psychosocial outcomes.
Crossing Knowledge Boundaries: From Team Learning to Knowledge Teams
Authors: Yeo Roland K.
Published: May 2020

This article explores how team learning is enhanced through facilitated knowledge sharing, leading to knowledge teams that are capable of identifying knowledge gaps and crossing knowledge boundaries. Based on a qualitative study, vignettes are used to illustrate the dynamics of team learning in different situational contexts, facilitating the way knowledge plays out at the intersection of knowledge boundaries. The study examines how team members integrate or downplay knowledge resources based on the trajectory of participation and learning. Such trajectory helps determine the extent to which knowledge spillovers create wider networks of learning, leading to different forms of organizational learning.
The Aftermath and the Aftermyth: Learning From Memoirists Who Experienced Sexual Assault While at University
Authors: Stewart Katherine E. , Charise Andrea , Polatajko Helene J. , Du Mont Janice
Published: May 2020

There is an abundance of research on the health consequences of sexual assault during university, but less attention has been paid to how sexual assault also shapes women’s everyday lives. To develop an understanding of the everyday aftermath of sexual assault, we used narrative inquiry to analyze how women textually represent everyday living after sexual assault during university within four memoirs. Memoirists discussed their lives as significantly changed and worked to repair their lives after sexual assault by engaging in a range of everyday activities. Although no single behavioral response was described, some memoirists were perceived as deviant if they engaged in behaviors that contradicted prevailing cultural myths and expectations about how one should behave after sexual assault. We need to create room for women to engage in personal, idiosyncratic responses if we are to challenge restrictive standards for doing in the aftermath of sexual assault during university.
Outcomes of Airway Stents in the Palliative Care of Patients With Cancer
Authors: Catarata Maria Joana Pereira , Saleiro Sandra , Araújo Vânia Sá
Published: May 2020

Introduction:

A significant proportion of patients with advanced primary or metastatic intrathoracic malignancy will eventually develop central airway obstruction. The morbidity associated with malignant airway obstruction (MAO) is considerable and the management is difficult. Our aim was to evaluate the outcomes of tracheobronchial stenting in patients with MAO and its role in palliative care.

Material and Methods:

This retrospective study involved a consecutive case series of patients with advanced cancer with MAO who underwent tracheobronchial stenting between August 2014 and August 2019. The European Cooperative Oncology Group (ECOG) scale was used to evaluate patient functional status before and after tracheobronchial stenting. Univariate survival analysis included Kaplan-Meier curves with Log-Rank test, while Cox regression was used as a multivariate analysis.

Results:

We included 28 patients with median age of 55.0 years (interquartile range = 49.3-66.5) and 89.3% male. The most frequent primary tumour was the esophagus followed by lungs. The majority of the patients (75%) expressed immediate symptom relief after stenting and there was a significant improvement in the mean ECOG performance status (PS; P = .005). There was no intraprocedure mortality and complications were observed in 6 patients. The median survival after airway stenting was 39.0 days (95% CI = 32.2-45.8) with poorer PS after stent insertion associated with lower overall survival (hazard ratio = 2.3 [95% CI = 1.1-4.9], P = .030) on multivariate analysis.

Conclusion:

Airway stent is a safe and effective procedure that offers rapid palliation of symptoms with no major complications. Therefore, stent placement should be considered as part of the treatment of patients with terminal cancer.
Pigmented Ependymoma of the Fourth Ventricle—A Curious Entity: Report of a Rare Case With Review of Literature
Authors: Malhotra Ankit , Rao Shilpa , Santhoshkumar Rashmi , Muralidharan Nufina , Mitra Saikat , Shetty Sathwik
Published: May 2020

A 16-year-old boy presented with a tumor located in fourth ventricle, which showed histological features of an ependymoma replete with perivascular pseudorosettes and true ependymal rosettes. Interestingly, many of the tumor cells exhibited abundant cytoplasm stuffed with a grayish brown pigment. Histochemical stains showed the pigment to be acid fast and periodic acid–Schiff positive and negative for Masson-Fontana melanin stain. Additionally, the pigment displayed brilliant autofluorescence under ultraviolet light of a fluorescent microscope. Ultrastructure examination of the pigment revealed a non–membrane-bound biphasic structure with an electron-dense core and electron-lucent periphery. Only few similar case reports mention such pigmented ependymomas to contain a mixture of neuromelanin and lipofuscin while others mention it to be melanin itself. Our workup suggests the pigment to represent lipofuscin or its derivative. Generally known to be a pigment of wear and tear, the significance of finding it in a tumor with such abundance remains to be understood and explored.
The Factor Structure and Gender Invariance of ADHD Symptoms in College Students
Authors: Flory Kate , Shi Dexin , Siceloff E. Rebekah , Roberts Alex M. , Castellanos Rebeca , Neger Emily , Taylor Stephen , Benson Kari
Published: May 2020

Previous studies examining the factor structure of attention-deficit/hyperactivity disorder (ADHD) symptoms in adults using self-report measures have shown mixed results, supporting two-, three-, and bifactor solutions. The current study further investigated the structure of ADHD symptoms in adults using the Current Symptoms Scale and rigorous model evaluation in a sample of 892 college students. Confirmatory factor analysis was used to analyze and compare five-factor structures; a single-factor model, a two-factor model, a three-factor model, and two bifactor models. A single-factor model with correlated residuals best fit the data. Factor correlations with nearly all related constructs (i.e., symptoms of oppositional defiant disorder, depression, impairment, previous ADHD diagnosis, grades, and substance use) were significant in the expected directions and the model was invariant across gender. These findings contribute to a growing body of work suggesting a unidimensional factor may best represent ADHD symptoms in adults. Implications are discussed.
Fault identification and severity analysis of rolling element bearings using phase space topology
Authors: Haj Mohamad T , Nataraj C
Published: May 2020

This article presents the application of phase space topology and time-domain statistical features for rolling element bearing diagnostics in rotating machines under variable operating conditions. The results indicate very promising performance in identifying various faults with virtually perfect accuracy, recall, and precision. A comparison with the envelope analysis method is performed to show the superior performance of the proposed approach. In addition, the results demonstrate an outstanding prediction rate for the fault diameter of bearing defects.
Proliferations of Post-Qualitative Inquiry and Academic Debate
Authors: Sweet Joseph D. , Cannon Susan Ophelia
Published: May 2020

In this commentary, we consider the evolving and ongoing debate regarding post-qualitative inquiry as evidenced in this Special Issue. We suggest that the debate is productive and that concretizing what post-qualitative inquiry could and should be might foreclose the potential richness of the field.
The Flow of Murder Cases Through the Criminal Justice System in a Brazilian City
Authors: Ribeiro Ludmila , Diniz Alexandre M. A.
Published: May 2020

The flow of homicide cases in Brazil can be described as a funnel, as numerous events are reported to the police but only a few are convicted. This article aims to identify the variables influencing time to clearance and time to conviction for murder cases in Belo Horizonte (Minas Gerais) by examining a sample of police investigations (uncleared cases) and criminal proceedings (cleared cases) closed between 2003 and 2013. Using Cox proportional hazard model, we found that time to clearance is affected by crime attributes and police procedures although time to conviction is affected only by arrest in flagrante delicto.
Factor Analysis of the Administrator-Research Campus Climate Collaborative (ARC3) Survey
Authors: Tilley Donna Scott , Wang Wanyi , Kolodetsky Ann , Yeatts Paul
Published: May 2020

Sexual assault, dating violence, stalking, and sexual harassment present serious challenges to the health and well-being of college students across the United States. An estimated one in five female college students is sexually assaulted during college. Under the federal protection of Title IX, institutions of higher education are responsible for addressing sexual harassment and sexual misconduct as forms of discrimination, thus campus climate surveys are increasingly being conducted in campus settings to examine student beliefs and experiences about sexual assault, dating violence, stalking, sexual harassment, and related campus prevention and response efforts. The Administrator-Researcher Campus Climate Collaborative (ARC3) Campus Climate Survey was designed to assess a range of Title IX violations that include sexual harassment, dating violence, and sexual misconduct victimization and perpetration. This article used a sample of students drawn from seven universities to assess the psychometric properties of the ARC3 survey. Specifically, factor analysis (exploratory and confirmatory) was used to examine the factor structure of each module of the ARC3 survey. Results indicated that the majority of modules within the ARC3 survey were valid and reliable. Recommendations are provided for university administration to utilize a scorecard approach in order to get a brief but comprehensive view of campus safety status.