bluuebunny/crossref_metadata_2025_split huggingface dataset:
An artificial neural network augmented GARCH model for Islamic stock market volatility: Do asymmetry and long memory matter?
Authors: Chkili Walid , Hamdi Manel 
Published: May 2021

Purpose
The purpose of this study is to investigate the volatility and forecast accuracy of the Islamic stock market for the period 1999–2017. This period is characterized by the occurrence of several economic and political events such as the September 11, 2001, terrorist attack and the 2007–2008 global financial crisis.

Design/methodology/approach
This study constructs a new hybrid generalized autoregressive conditional heteroskedasticity (GARCH)-type model based on an artificial neural network (ANN). This model is applied to the daily Dow Jones Islamic Market World Index during the period June 1999–January 2017.

Findings
The in-sample results show that the volatility of the Islamic stock market can be better described by the fractionally integrated asymmetric power ARCH (FIAPARCH) approach that takes into account asymmetry and long memory features. Considering the out-of-sample analysis, this paper has applied a hybrid forecasting model, which combines the FIAPARCH approach and the ANN. Empirical results reveal that the proposed hybrid model (FIAPARCH-ANN) outperforms all other single models such as GARCH, fractional integrated GARCH and FIAPARCH in terms of all performance criteria used in the study.

Practical implications
The results have some implications for Islamic investors, portfolio managers and policymakers. These implications are related to the optimal portfolio diversification decision, the hedging strategy choice and the risk management analysis.

Originality/value
The paper develops a new framework that combines an ANN and FIAPARCH model that introduces two important features of time series, namely, asymmetry and long memory.
Connecting and being connected: investigating friending practices across multiple social networking sites
Authors: Yuan Chien Wen , Lee Yu-Hao 
Published: May 2021

PurposeSocial networking sites (SNSs) offer people the possibility of maintaining larger networks of social ties, which also entails more complex relationship maintenance across multiple platforms. Whom to “friend” and via which platform can involve complex deliberations. This study investigates the relationships between users' perceived friending affordances of five popular SNSs (Facebook, Twitter, Instagram, Snapchat and LinkedIn) and their friending behaviors concerning strong ties, weak ties (existing and latent ties) and parasocial ties.Design/methodology/approachAn online survey using Qualtrics was provided to participants (N = 626) through Amazon's Mechanical Turk (MTurk). The survey asked their SNS use and their friending behaviors with different ties on each of the sites.FindingsUsers' friending decisions are dependent on an interplay of socio-technical affordances of each SNS and specific needs for the ties. The authors found that the affordances of bridging social capital and enjoyment are aligned with friending weak and parasocial ties, respectively. The affordances of bonding social capital were not valued to friend strong ties.Originality/valueThe study extends the affordance and social capital literature by assessing users' perceived, contextualized SNS affordances in relation to actual communication behaviors in friending different social ties. This approach provides contextualized insights to friending decisions and practices on SNSs.
The design, implementation and pilot application of an intelligent online proctoring system for online exams
Authors: Jia Jiyou , He Yunfan 
Published: May 2021

Purpose
The purpose of this study is to design and implement an intelligent online proctoring system (IOPS) by using the advantage of artificial intelligence technology in order to monitor the online exam, which is urgently needed in online learning settings worldwide. As a pilot application, the authors used this system in an authentic university online exam and checked the proctoring result.

Design/methodology/approach
The IOPS adopts the B/S (Browser/Server) architecture. The server side is implemented with programming language C and Python and stores the identification data of all examinees and their important behavior change status, including facial expression, eye and mouth movement and speech. The browser side collects and analyzes multimodal data of the examinee writing the online test locally and transfers the examinee’s most important behavior status change data to the server. Real-time face recognition and voice detection are implemented with the support of open-source software.

Findings
The system was integrated into a Web-based intelligent tutoring system for school mathematics education. As a pilot application, the system was also used for online proctored exam in an undergraduate seminar in Peking University during the epidemic period in 2020. The recorded log data show that all students concentrated themselves on the exam and did not leave the camera and did not speak.

Originality/value
During the epidemic period of the novel coronavirus outbreak, almost all educational institutions in the world use online learning as the best way to maintain the teaching and learning schedule for all students. However, current online instruction platforms lack the function to prevent the learners from cheating in online exams and cannot guarantee the integrity and equality for all examinees as in traditional classroom exams. The literature review shows that the online proctoring system should become an important component of online exams to tackle the growing online cheating problem. Although such proctoring systems have been developed and put on the market, the practical usage of such systems in authentic exams and its effect have not been reported. Those systems are heavyweight and commercial product and cannot be freely used in education. The light-weight IOPS developed by the authors could meet the need for online exam as a stable and practical approach and could contribute to the growing online learning and distance learning.
A systematic review and meta‐synthesis exploring client experience of reflecting teams in clinical practice
Authors: Harris Rachael , Crossley Jon 
Published: May 2021

There is a dearth of readily available evidence on the impact of reflecting teams in family therapy. A synthesis of the literature was needed to provide clarity and insight into client experience of the process. A systematic search of the reflecting team literature was conducted and 11 papers using qualitative methodologies were identified. The findings of these studies were synthesised using meta‐ethnography. Three themes were identified; ‘unusual and strange’; ‘unique conversations’ and ‘therapeutic environment’. The reflecting team process was unanticipated and unique, but it could be helpful where people were made to feel safe and understood. Reflecting teams, while initially received as an odd and unusual experience, are typically found to be an effective and helpful approach within family and couples therapy. Extra considerations should be taken to ensure that clients feel able to engage with the process, avoiding it becoming overwhelming and unhelpful.Practitioner points

Higher levels of self‐awareness and uncertainty are present for the family when first presented with the reflecting team.

A strong rapport with the lead therapist can support family engagement with the team.

Reflecting teams were experienced as more effective when they represent a diverse group of professional, ethnic and cultural backgrounds.

Hope and validation are vital parts of creating a therapeutic space which is effective in introducing difference to a family.
Frailty as biographical disruption
Authors: Cluley Victoria , Martin Graham , Radnor Zoe , Banerjee Jay 
Published: May 2021

AbstractBiographical disruption positions the onset of chronic illness as a major life disruption in which changes to body, self and resources occur (Sociology of Health & Illness, 4, 1982, 167–182). The concept has been used widely in medical sociology. It has also been subject to critique and development by numerous scholars. In this paper, we build on recent developments of the concept, particularly those taking a phenomenological approach, to argue that it can also help in understanding other disruptive health‐related experiences across the life course, in this case the onset of frailty. We draw on the findings of 30 situated interviews with frail older people, relating their experiences of frailty to the concept of biographical disruption. We show that frailty shares many similarities with the experience of chronic illness. Using the lens of biographical disruption to understand frailty also offers insights relevant to recent debates around both concepts, and on the continued relevance of the idea of biographical disruption given changing experiences of health and illness, including the circumstances in which biographical disruption is more and less likely to be experienced. Finally, we reflect on the potentials and limitations of applying the concept to a health‐related condition that cannot be categorised as a disease.
Frozen while I scan: Examining the impact of media dependencies, socioeconomic status and rumination on preparation behaviours related to Hurricane Dorian
Authors: Lachlan Kenneth A. , Gilbert Christine , Spence Patric R. , Hutter Emily 
Published: May 2021

AbstractBuilding on previous crisis and risk literature, this study investigates media dependencies, information seeking, preparation behaviours and rumination tendencies among individuals living on the Atlantic seaboard who were impacted by Hurricane Dorian in 2019. Consistent with previous work, participants continue to perceive television, a legacy media, as the most important source of information—both initially and throughout the event. This study also analysed the extent to which information seeking, preparation behaviours and rumination tendencies may be related, drawing from recent work that has suggested that rumination tendencies may help explain sex differences in information seeking. Results suggested that those with higher rumination tendencies were more likely to perceive all sources of information as very important, with the exception of television, which was heavily relied upon by most participants. Rumination tendencies did not explain the variance in any of the three preparation behaviours examined. Overall, most participants had an emergency kit and an evacuation plan in place, while socioeconomic status positively predicted home preparation.
Absence of known feline MYH7 and MYBPC3 variants in a diverse cohort of cats with hypertrophic cardiomyopathy
Authors: O'Donnell K. , Adin D. , Atkins C. E. , DeFrancesco T. , Keene B. W. , Tou S. , Meurs K. M. 
Published: May 2021

SummaryHypertrophic cardiomyopathy (HCM) is the most common cause of heart disease in the domestic cat with a genetic predisposition in a few breeds. In the Maine Coon and Ragdoll breeds, two variants associated with the HCM phenotype have been identified in the cardiac myosin binding protein C gene (MYBPC3; p.Ala31Pro and p.Arg820Trp respectively), and a single variant has been identified in the myosin heavy chain gene (MYH7; p.Glu1883Lys) in one domestic cat with HCM. It is not known if these variants influence the development of HCM in other cohorts of the feline population. The objective of this study was to evaluate the presence of the known MYBPC3 and MYH7 variants in a population of cats with HCM. DNA was isolated from samples collected from non‐Ragdoll and non‐Maine Coon domestic cats diagnosed with HCM through the North Carolina State University College of Veterinary Medicine and genotyped for the three variants. One‐hundred and three DNA samples from cats with HCM were evaluated from domestic shorthair, domestic longhair and purebred cats. All samples were wt for the MYBPC3 and MYH7 variants. Although this study was limited by its inclusion of cats from one tertiary hospital, the lack of these MYBPC3 and MYH7 variants in this feline HCM population indicates that the clinical utility of genetic testing for these variants may be isolated to the two cat breeds in which these variants have been identified. Further studies to identify the causative variants for the feline HCM population are warranted.
Multinational banks in regulated markets: Is financial integration desirable?
Authors: Haufler Andreas , Wooton Ian 
Published: May 2021

AbstractA core question regarding the increasing share of international trade in financial services is whether this causes banks to take more or fewer risks. We study this issue in a setting where two multinational banks engage in duopoly competition for their lending in two regional markets. Each bank affiliate can choose both the lending volume and the level of monitoring, and hence risk‐taking, where the risk of bank failure is partly borne by taxpayers in the bank affiliate's host country. Governments choose minimum capital requirements to optimally solve the trade‐off between higher lending volumes and consumer surplus, and the expected tax losses faced by taxpayers. In this setting, we consider two types of financial integration. A reduction in the transaction costs of cross‐border banking increases risk‐taking by banks, harming taxpayers and potentially overall welfare. In contrast, a reduction in the costs of screening foreign firms reduces banks' risk‐taking and is beneficial for consumers and taxpayers alike.
Toddlers and Preschoolers Understand That Some Preferences Are More Subjective Than Others
Authors: Doan Tiffany , Friedman Ori , Denison Stephanie 
Published: May 2021

Four experiments examined Canadian 2‐ to 3‐year‐old children’s (N = 224; 104 girls, 120 boys) thoughts about shared preferences. Children saw sets of items, and identified theirs and another person’s preferences. Children expected that food preferences would be more likely to be shared than color preferences, regardless of whether the items were similar or different in appeal (Experiments 1–3). A final study replicated these findings while also exploring children’s expectations about activity and animal preferences. Across all studies, children expected shared preferences at surprisingly low rates (never higher than chance). Overall, these findings suggest that young children understand that some preferences are more subjective than others, and that these expectations are driven by beliefs about domains of preferences.
Therapeutic vaccination for treatment of chronic hepatitis B
Authors: Cargill Tamsin , Barnes Eleanor 
Published: May 2021

SummaryChronic hepatitis B infection remains a serious global health threat, contributing to a large number of deaths through liver cirrhosis and hepatocellular carcinoma. Current treatment does not eradicate disease, and therefore new treatments are urgently needed. In acute hepatitis B virus (HBV) a strong immune response is necessary to clear the virus, but in chronic infection the immune response is weakened and dysfunctional. Therapeutic vaccination describes the process of inoculating individuals with a non-infective form of viral antigen with the aim of inducing or boosting existing HBV-specific immune responses, resulting in sustained control of HBV infection. In this review we outline the rationale for therapeutic vaccination in chronic HBV infection, discuss previous and ongoing trials of novel HBV therapeutic vaccine candidates and outline strategies to improve vaccine efficacy going forward.
Variable effects of protected areas on long‐term multispecies trends for Australia's imperiled birds
Authors: Bayraktarov Elisa , Correa Diego F. , Suarez‐Castro Andrés F. , Garnett Stephen T. , Macgregor Nicholas A. , Possingham Hugh P. , Tulloch Ayesha I. T. 
Published: May 2021

AbstractProtected areas are important for preventing biodiversity declines, yet indicators of species' trends in protected areas rarely include threatened species. We use data from the first national Threatened Species Index developed in Australia to report on trends for threatened and near‐threatened birds inside and outside terrestrial and marine protected areas. We adopted the Living Planet Index to calculate trends for 39 bird taxa at 16,742 monitoring sites (11,539 inside and 5,203 outside PAs) between 1985 and 2016. At a continental scale, the overall decline in the national index was smaller inside protected areas (66% decrease in average population abundance) than outside (77%), although after 2000 declines were greater within (36%) versus outside (26%) protected areas. Five out of seven jurisdictions showed similar switching in patterns over time. Protected areas initially had a greater net positive effect on trends of more imperiled birds than less imperiled birds, but between 2000 and 2016 declines of the most imperiled birds were greater inside protected areas than outside. Our analyses suggest that the effectiveness of Australia's protected area network at improving trends in threatened species has weakened, and support the hypothesis that trends for terrestrial birds outside PAs might be improving due to increased conservation efforts on private land. Although this study represents the most comprehensive collation of threatened species population time series and trends ever for Australia, the number of monitoring sites inside PAs was double that outside PAs, even though on average, more than 70% of threatened bird distributions occur outside PAs, with important gaps in monitoring across space, time and taxa that need to be filled to fully understand the effectiveness of public and private conservation actions at a national level. The results underline the importance of active management plus monitoring to track and report on long‐term trends across species.
Population genetic patterns of a mangrove‐associated frog reveal its colonization history and habitat connectivity
Authors: Zheng Yitao , Zhang Shan , Lu Qi , Zhang Siyu , Wang Lijun , Hong Meiling , Nguyen Truong , Zhao Jindong , Yao Meng 
Published: May 2021

AbstractAimTo understand the impact of historical and contemporary habitat distributions and connectivity on the spatial patterns of a species' genetic variation and divergence, we examined the phylogenetic relationship, population genetic structure and demographic history of a mangrove‐specialist, the crab‐eating frog (Fejervarya cancrivora) from 10 geographic populations in China and northern Vietnam.LocationSoutheast Asian coasts, especially the southern China and northern Vietnam coasts.MethodsWe used the sequences of three mitochondrial DNA (mtDNA) regions to infer phylogenetic relationships and divergence times between our samples and those from other Southeast Asian countries. Thirteen nuclear microsatellite loci were used to analyse population genetic structure. Ancient and more recent demographic history was assessed using mtDNA and microsatellite data, respectively, and population divergence history scenarios were evaluated using approximate Bayesian computation.ResultsThe mtDNA haplotypes from China joined the F. cancrivora clades from the Philippines, Thailand and Bangladesh, which diverged from the clades from Malaysia and Indonesia. Microsatellite analyses revealed three genetically differentiated clusters and a strong pattern of isolation by distance at the individual level. Ancient population sizes were relatively stable, but genetic signatures of recent population declines were detected. Population divergence history analyses supported that Hainan populations were ancestral to those of the Guangdong, Guangxi and northern Vietnam populations.Main conclusionsOur results suggest that F. cancrivora's contemporary genetic patterns have been shaped by past and present habitat conformations. This species may have dispersed along the coast from Southeast Asia to China during Pleistocene glaciations when sea levels were low, colonizing the Hainan area first. It subsequently spread to mainland China coasts when sea levels rose and shorelines withdrew. Additionally, current declines and fragmentation of mangrove forests have likely exacerbated population reductions and genetic divergences among now disjunct populations. This study provides a framework for understanding the population history of mangrove‐associated biota and thus aids conservation management of this critical ecosystem.
Red dichromatic imaging reduces endoscopic treatment time of esophageal varices by increasing bleeding point visibility (with video)
Authors: Furuichi Yoshihiro , Abe Masakazu , Takeuchi Hirohito , Yoshimasu Yuu , Itoi Takao 
Published: May 2021

BackgroundRed dichromatic imaging (RDI) is a novel image‐enhanced endoscopy released in 2020, which increases the visibility of deeper vessels. In this study, we retrospectively investigated whether RDI can shorten treatment times of endoscopic injection sclerotherapy (EIS), and which operational procedure times are affected compared with white light imaging (WLI).MethodsA total of 155 patients (RDI, 70; WLI, 85) with risky esophageal varices (EV), who were treated with EIS were analyzed. Treatment times were compared, and predictors associated with treatment time were analyzed by multivariate analysis. For 24 cases (RDI, 12; WLI, 12) in which treatment videos were recorded, the procedure times of each step (observation of EV, needle flush, positioning, puncture, observation of bleeding, hemostasis, observation after hemostasis) were measured. Regarding the seven patients with EV bleeding, color differences were calculated between the bleeding point and the blood pool using the CIE (L*a*b*) color measurement method, and results were compared between using RDI and WLI.ResultsTreatment times were shorter in the RDI group (RDI vs. WLI = 35.1 vs. 42.2 min; P < 0.01). ‘RDI function’ and ‘amount of sclerosant’ were extracted as independent predictors of treatment time. Times for ‘observation of EV’ and ‘observation of bleeding’ were shorter in the RDI group (P = 0.01 and <0.01, respectively). Regarding the color difference, RDI significantly increased bleeding point visibility (RDI vs. WLI = 31.4 ± 11.8 vs. 8.6 ± 6.2, P < 0.001).ConclusionRed dichromatic imaging can shorten the treatment time of EIS by increasing bleeding point visibility.
Peak atrial longitudinal strain is predictive of atrial fibrillation in patients with chronic obstructive pulmonary disease and coronary artery disease
Authors: Pavasini Rita , Fabbri Gioele , Fiorio Alessio , Campana Roberta , Passarini Giulia , Verardi Filippo Maria , Contoli Marco , Campo Gianluca 
Published: May 2021

AbstractBackgroundThe peak atrial longitudinal strain (PALS) has been validated in the prediction of atrial fibrillation (AF) in the general population. If this finding can be applied to patients with chronic obstructive pulmonary disease (COPD) and concomitant coronary artery disease (CAD) is unknown.Methods and resultsWe analyzed two different study populations of patients with COPD and acute CAD in SCAP trial (Clinical trial.org identifier NCT02324660) and COPD and stable CAD in the NATHAN‐NEVER trial (clinical trial.org identifier NCT02519608). All patients enrolled underwent spirometry and clinical specialistic evaluation to test COPD diagnosis. During the index evaluation, all patients underwent echocardiography. The primary endpoint of the study was the occurrence of AF. Overall, 175 patients have been enrolled. PALS was significantly lower in patients with COPD compared to patients without COPD (26% ± 8% vs. 30% ± 8% for PALS4CV, P = .003). After a mean follow‐up of 49 ± 15 months, 26 patients experienced at least one episode of AF. At multivariable analysis, only PALS (HR: 0.92, 95% CI: 0.86‐0.98, P = .014) resulted as an independent predictor of AF in COPD patients with CAD, with the best cutoff value of 25.5% (sensitivity 87% and specificity 70%).ConclusionThe present study confirmed a high incidence of AF events in COPD patients and that PALS is altered and able to independently predict AF in a specific cohort of patients with CAD and COPD. This study points out the need to integrate PALS measurement in the echocardiographic workup of all COPD patients, to early identify those at high risk of AF development.