bluuebunny/crossref_metadata_2025_split huggingface dataset:
Temporal changes in global stock markets during COVID-19: an analysis of dynamic networks
Authors: Zaheer Kashif , Aslam Faheem , Tariq Mohmand Yasir , Ferreira Paulo 
Published: February 2022

PurposeCOVID-19 evolved from a local health crisis to a pandemic and affected countries worldwide accordingly. Similarly, the impacts of the pandemic on the performance of global stock markets could be time-varying. This study applies a dynamic network analysis approaches to evaluate the evolution over time of the impact of COVID-19 on the stock markets' network.Design/methodology/approachDaily closing prices of 55 global stock markets from August 1, 2019 to September 10, 2020 were retrieved. This sample period was further divided into nine subsample periods for dynamic analysis purpose. Distance matrix based on long-range correlations was calculated, using rolling window's length of 100 trading days, rolled forward at an interval of one month's working days. These distance matrices than used to construct nine minimum spanning trees (MSTs). Network characteristics were figured out, community detection and network rewiring techniques were also used for extracting meaningful from these MSTs.FindingsThe findings are, with the evolution of COVID-19, a change in co-movements amongst stock markets' indices occurred. On the 100th day from the date of reporting of the first cluster of cases, the co-movement amongst the stock markets become 100% positively correlated. However, the international investor can still get better portfolio performance with such temporal correlation structure either avoiding risk or pursuing profits. A little change is observed in the importance of authoritative node; however, this central node changed multiple times with change of epicenters. During COVID-19 substantial clustering and less stable network structure is observed.Originality/valueIt is confirmed that this work is original and has been neither published elsewhere, nor it is currently under consideration for publication elsewhere.
Relationship between transformational leadership, proactive personality, creative self-efficacy and employee creativity at food processing SMEs in Indonesia
Authors: Maria Aletta Dewi , Yulianto Heru , Palupiningtyas Dyah , Usodo Heri 
Published: February 2022

PurposeThis study aims to determine the effect of transformational leadership and creative self-efficacy (CSE) on employee creativity. In addition, this study will also discuss the role of CSE as a mediator in the relationship between transformational leadership and employee creativity, and the role of proactive personality as a moderator in the relationship between CSE and employee creativity.Design/methodology/approachThe research samples were 102 supervisors and 876 employees from 102 small and medium-sized enterprises (SMEs) engaged in the food processing industry in three major cities in Central Java, Indonesia, namely Semarang, Salatiga and Surakarta. SPSS 22 was used to test the research hypothesis using hierarchical regression analysis.FindingsThe results showed that CSE mediated the relationship between transformational leadership and employee creativity. In addition, the results also showed that proactive personality acted as a moderator for CSE and employee creativity.Research limitations/implicationsThis study has several limitations. First, that the sample size is limited only to food processing SMEs. Second, questionnaires were self-reported by respondents. Self-reporting may not always result in reliable and accurate responses. Lastly, this study uses a cross-sectional research design.Practical implicationsThis study presents strong theoretical and managerial implications that can be used by food processing SMEs to evaluate the consequences of transformational leadership, proactive personality, and CSE on employee creativity.Originality/valueThis study adds to the existing literature by describing the relationship between transformational leadership, CSE, proactive personality and employee creativity in a comprehensive manner.
How do artificial bacteria behave in magnetized nanofluid with variable thermal conductivity: application of tumor reduction and cancer cells destruction
Authors: Elgazery Nasser S. , Elelamy Asmaa F. , Bobescu Elena , Ellahi R. 
Published: February 2022

Purpose
The study aims to determine an efficiency of external magnetic field on the bacteria surrounded by thousands of magnetic magnetite nanoparticles. The interstitial nanoliquid in which an artificial bacteria swims in biological cell is utilized with variable thermal conductivity. Two dimensions unsteady motion of second grade fluid are considered. The stretching wall is taken as a curved surface pattern.

Design/methodology/approach
The mathematical results have been obtained by Chebyshev pseudospectral method.

Findings
The impact of the various governing parameters is described by numerical tables and diagrams. It is proven that the pure blood velocity curves are higher when compared with the magnetite/blood. It is demonstrated from clinical disease that dangerous tumors show diminished blood flow. This study concludes that the blood velocity profile increases by increasing the values of fluid parameters. This implies that the medication conveyance therapy lessens the tumor volume and helps in annihilating malignancy cells. The blood temperature distribution raises as the magnetite nanoparticles concentration increases. Consequently, the physical properties of the blood can be enhanced by immersing the magnetite nanoparticles. Further, the present outcomes cleared the thermal conductivity as, a variable function of the temperature, has an important role to enhance the heat transfer rate.

Originality/value
To the best of authors’ knowledge, this study is reported for the first time.
Individual-contextual determinants of entrepreneurial service provision in the platform-based collaborative economy
Authors: Leick Birgit , Falk Martin Thomas , Eklund Mehtap Aldogan , Vinogradov Evgueni 
Published: February 2022

PurposeThis article examines the nature of service provision in the platform-based collaborative economy from the perspective of entrepreneurship theories. It departs from a knowledge gap about the individual and contextual determinants of service provision through digital platforms. By exploring these determinants for the service provision in two main sectors of the collaborative economy, transportation and accommodation, the study provides a first conceptual introduction of these activities and their nature for the existing entrepreneurship research.Design/methodology/approachThe analysis is based upon Eurobarometer microdata (2018), covering 28 European countries with about 27,000 observations, and uses a seemingly unrelated Probit model.FindingsThe likelihood of service provision through platforms in the collaborative economy is highest for individuals aged 25–34 years but decreases continuously with age. Occupation, sex and population density of the place of residence are other relevant determinants. By contrast, the regulatory system and GDP per capita of the region are not relevant.Research limitations/implicationsThe findings illuminate the under-studied individual and contextual determinants related to individuals engaging with entrepreneurial activities in the collaborative economy. Future research should investigate the role of previous self-employment, skills and spatial context.Practical implicationsThe collaborative economy is still a marginal sector in Europe that is likely to grow bigger. Particularly the young, highly educated entrepreneurial persons located in urban regions may spur this expected growth. Supporting policy measures aimed at this social stratum might foster digital entrepreneurship and contribute to growth in the digital economy.Originality/valueBy exploring the individual and contextual determinants for the service provision in the two main sectors of the platform-based collaborative economy, transportation and accommodation, the study provides a first conceptual introduction of these activities and their nature into existing entrepreneurship research.
A novel Stereo-IMU system based on accurate pose parameterization of two-wheeled inverted pendulum (TWIP) robot in localization and mapping
Authors: Zhai Yanwu , Feng Haibo , Zhou Haitao , Zhang Songyuan , Fu Yili 
Published: February 2022

Purpose
This paper aims to propose a method to solve the problem of localization and mapping of a two-wheeled inverted pendulum (TWIP) robot on the ground using the Stereo–inertial measurement unit (IMU) system. This method reparametrizes the pose according to the motion characteristics of TWIP and considers the impact of uneven ground on vision and IMU, which is more adaptable to the real environment.

Design/methodology/approach
When TWIP moves, it is constrained by the ground and swings back and forth to maintain balance. Therefore, the authors parameterize the robot pose as SE(2) pose plus pitch according to the motion characteristics of TWIP. However, the authors do not omit disturbances in other directions but perform error modeling, which is integrated into the visual constraints and IMU pre-integration constraints as an error term. Finally, the authors analyze the influence of the error term on the vision and IMU constraints during the optimization process. Compared to traditional algorithms, the algorithm is simpler and better adapt to the real environment.

Findings
The results of indoor and outdoor experiments show that, for the TWIP robot, the method has better positioning accuracy and robustness compared with the state-of-the-art.

Originality/value
The algorithm in this paper is proposed for the localization and mapping of a TWIP robot. Different from the traditional positioning method on SE(3), this paper parameterizes the robot pose as SE(2) pose plus pitch according to the motion of TWIP and the motion disturbances in other directions are integrated into visual constraints and IMU pre-integration constraints as error terms, which simplifies the optimization parameters, better adapts to the real environment and improves the accuracy of positioning.
Sustainable response system building against insider-led cyber frauds in banking sector: a machine learning approach
Authors: Chhabra Roy Neha , Prabhakaran Sreeleakha 
Published: February 2022

Purpose
This paper aims to focus on the different types of insider-led cyber frauds that gained mainstream attention in recent large-scale fraud events involving prominent Indian banking institutions. In addition to identifying and classifying cyber fraud, the study maps them on a severity scale for optimal mitigation planning.

Design/methodology/approach
The methodology used for identification and classification is an analysis of a detailed literature review, a focus group discussion with risk and vigilance officers and cyber cell experts, as well as secondary data of cyber fraud losses. Through machine learning-based random forest, the authors predicted the future of insider-led cyber frauds in the Indian banking business and prioritized and predicted the same. The projected future reveals the dominance of a few specific cyber frauds, which will make it easier to develop a fraud mitigation model based on a victim-centric approach.

Findings
The paper concludes with a conceptual framework that can be used to ensure a sustainable cyber fraud mitigation ecosystem within the scope of the study. By using the findings of this research, policymakers and fraud investigators will be able to create a more robust environment for banks through timely detection of cyber fraud and prevent it appropriately before it happens.

Research limitations/implications
The study focuses on fraud, risk and mitigation from a victim-centric perspective and does not address it from the fraudster’s perspective. Data availability was a challenge. Banks are recommended to compile data that can be used for analysis both by themselves and other policymakers.

Practical implications
The structured, sustainable cyber fraud mitigation suggested in the study will provide an agile, quick, proactive, stakeholder-specific plan that helps to safeguard banks, employees, regulatory authorities, customers and the economy. It saves resources, cost and time for bank authorities and policymakers. The mitigation measures will also help improve the reputational status of the Indian banking business and prolong the banks’ sustenance.

Originality/value
The innovative cyber fraud mitigation approach contributes to the sustainability of a bank’s ecosystem quickly, proactively and effectively.
Extreme dependence and risk spillover across G7 and China stock markets before and during the COVID-19 period
Authors: Ghorbel Ahmed , Fakhfekh Mohamed , Jeribi Ahmed , Lahiani Amine 
Published: February 2022

PurposeThe paper analyzes downside and upside risk spillovers between stock markets of G7 countries and China before and during the COVID-19 pandemic.Design/methodology/approachBy using VAR-ADCC models and conditional value at risk (CoVaR) techniques, downside and upside risk spillovers between stock markets of G7 countries and China are analyzed before and during the COVID-19 pandemic.FindingsThe results suggested existence of a significant and asymmetrical two-way risk transmission between majority of pair markets, but the degree of asymmetry differs according to the use of the entire cumulative distributions or distribution tails. Downside and upside risk spillovers are significantly larger before the COVID-19 pandemic in all cases except between CAC 40/DAX and S&P/SSE pairs.Originality/valueThe paper used CoVaR and delta-CoVaR to investigate the downside and upside spillovers between stock markets of G7 countries and China before and during the COVID-19 pandemic.
An empirical assessment of enterprise information systems success in a developing country: the Jordanian experience
Authors: Al-Okaily Manaf , Al-Okaily Aws 
Published: February 2022

PurposeThe paper discusses the assessment of enterprise information systems (EIS) success in an organizational context is one area that is not sufficiently researched. This lack of theoretical attention prompted the authors to measure EIS success in the organizational setting of Jordanian listed firms.Design/methodology/approachBased on the DeLone and McLean success model and by adopting a quantitative approach, survey data were collected through questionnaires. The established questionnaires were distributed to 250 senior IT executives who use EIS and a total of 134 valid questionnaires were empirically tested via the Smart-PLS technique.FindingsThe investigation findings indicate that information and system quality had a positive impact on user satisfaction and individual impact. User satisfaction had a positive influence on individual impact, both of which eventually lead to organizational impact. The results also showed that the model used has adequate convergent and discriminant validities, as well as sufficient reliability.Practical implicationsThe outcomes can help managers and practitioners more effectively understand the factors influencing EIS success among Jordanian listed firms.Originality/valueThis research paper is the very first in assessing EIS success from an organizational perspective in developing country such as Jordan.
Rights‐based accountability in aged care organisations: The roles of beliefs and boundary controls
Authors: Chen Jinhua , Harrison Graeme , Jiao Lu 
Published: February 2022

AbstractAddressing the urgent need for aged care providers in Australia to enhance their accountability, this study examines whether and how downward accountability (to clients) and lateral accountability (to employees) in aged care organisations are affected by beliefs and boundary controls exercised by the organisations’ management. Analyses were performed on survey data collected from 228 not‐for‐profit aged care providers across Australia. The analyses show that beliefs control positively affects both downward and lateral accountability, whereas boundary control positively affects downward accountability. Further, boundary control marginally moderates the relation between beliefs control and lateral accountability. The study contributes to both not‐for‐profit accountability and management control literatures. Its findings have implications for aged care providers, which are experiencing significant reforms that aim to improve accountability to senior Australians and employees in the organisations.
Use of electric network frequency presence in video material for time estimation
Authors: Frijters Guus , Geradts Zeno J. M. H. 
Published: February 2022

AbstractIn this research, the possibility of estimating the time a video was recorded at through electric network frequency is explored by examining various light sources in differentiating circumstances. This research focuses on videos made with smartphones. The smartphone cameras make use of an integrated complementary metal oxide semiconductor sensor. The filmed videos are analyzed using software, which employs a small electric network frequency (ENF) database to determine the time of recording of a video made in experimental circumstances. This research shows that in ideal circumstances, it is possible to determine the time stamp of a video recording made with a smartphone. However, it becomes clear that different light sources greatly influence the outcome. The best results are achieved with Halogen and Incandescent light sources, both of which also seem promising in less ideal circumstances. LED sources do work in ideal circumstances and, however, do not show much success in lesser circumstances. This research further demonstrates that there is potential in using ENF to determine a time stamp of recorded videos and provides validation on prior research on this topic. It proves usable in ideal circumstances with the presence of a clear light source on a white wall. With additional research, it has potential to become a feasible method to use for forensic settings in circumstances that are less ideal.
Neoadjuvant chemotherapy with liposomal paclitaxel plus platinum for locally advanced esophageal squamous cell cancer: Results from a retrospective study
Authors: Wang Wenzhong , Yi Yang , Jia Yinghui , Dong Xiaoxin , Zhang Junxia , Song Xiaomeng , Song Yan 
Published: February 2022

AbstractBackgroundThis study analyzed the efficacy and safety of neoadjuvant chemotherapy with liposomal paclitaxel plus platinum in patients with locally advanced resectable esophageal squamous cell carcinoma (ESCC).MethodsThe data of patients with locally advanced resectable ESCC (staging cT2N + M0, cT3‐4aNanyM0, IA‐IVA) who received preoperative chemotherapy with liposomal paclitaxel plus platinum (cisplatin, nedaplatin or carboplatin) in HuanXing Cancer Hospital from July 2018 to October 2019 were collected. The primary endpoint of this study was R0 resection rate, and secondary endpoints were pathological complete response (pCR) rate, 1‐ and 2‐year overall survival (OS) rate, 1‐year and 18‐month disease‐free survival (DFS) rate, and safety.ResultsA total of 32 eligible patients were included in this study. All patients received neoadjuvant chemotherapy and surgery. The R0 resection rate was 93.8%, the pCR rate was 12.5%, and down‐staging was achieved in 14 patients (47.8%). Median follow‐up was 31.0 months (95% confidence interval [CI] 30.1–31.9 months). The 1‐ and 2‐year OS rates were 96.9% and 78.1%, and the 1‐year and 18‐month DFS rates were 86.7% and 76.7%, respectively. The median DFS and OS were not reached. The incidence rate of neoadjuvant chemotherapy related grade 3–4 adverse events was 21.9%, including neutropenia (21.9%) and leukopenia (9.4%).ConclusionsThe results of this study suggest that liposomal paclitaxel combined with platinum as neoadjuvant chemotherapy can provide satisfactory R0 resection rate and survival rate, and significant tumor down‐staging effect for patients with locally advanced resectable ESCC, with safety profile.
Neurocognitive risk in sickle cell disease: Utilizing neuropsychology services to manage cognitive symptoms and functional limitations
Authors: Longoria Jennifer N. , Heitzer Andrew M. , Hankins Jane S. , Trpchevska Ana , Porter Jerlym S. 
Published: February 2022

SummarySickle cell disease (SCD) is an inherited blood disorder that is associated with developmental delays and neurocognitive deficits. This review details key findings related to neurocognitive outcomes for children and adults with emphasis on the impact of neurological correlates and disease severity. Associations between neurocognition, demographic factors and social determinants of health are also reviewed. Emerging literature has reported on the neurocognitive impact of SCD in children and adolescents in Africa and Europe, including children from immigrant communities. Neurocognitive deficits are linked to poor functional outcomes, including transition from paediatric to adult care, medication adherence and unemployment. Integrating neuropsychology into multidisciplinary care for individuals with SCD can assist with identification and management of neurocognitive concerns, intervention development, individualized care plan development and continued multidisciplinary research.
Weight reduction added to CPAP decreases blood pressure and triglyceride level in OSA: Systematic review and meta‐analysis
Authors: Kovács Dóra K. , Gede Noémi , Szabó László , Hegyi Péter , Szakács Zsolt , Faludi Béla , Sebők Ágnes , Garami András , Solymár Margit , Kósa Dániel , Hanák Lilla , Rumbus Zoltán , Balaskó Márta 
Published: February 2022

AbstractObstructive sleep apnea (OSA) is associated with treatment‐resistant hypertension and high cardiovascular risk. Continuous positive airway pressure (CPAP) fails to reduce cardiovascular risks consistently. Obesity and OSA show reciprocal association and they synergistically increase hypertension via different pathways. Our meta‐analysis aimed to assess the cardiovascular benefits of combining weight loss (WL) with CPAP (vs. WL or CPAP alone) in OSA. Outcomes included systolic and diastolic blood pressure (BP) and blood lipid parameters. We explored Medline, Embase, Cochrane, and Scopus. Eight randomized controlled studies (2627 patients) were included. The combined therapy decreased systolic BP more than CPAP alone. Weighted mean difference (WMD) for CPAP + WL versus CPAP was −8.89 mmHg, 95% confidence interval (95% CI; −13.67 to −4.10, p < 0.001) for systolic BP. For diastolic BP, this decrease was not significant. In case of blood lipids, the combined treatment decreased triglyceride levels more than CPAP alone (WMD = −0.31, 95% CI −0.58 to −0.04, p = 0.027). On the other hand, addition of CPAP to WL failed to suppress BP further. The certainty of evidence according to GRADE was very low to moderate. In conclusion, our results showed that the addition of WL to CPAP significantly improved BP and blood lipid values in OSA. On the other hand, the addition of CPAP to WL could not significantly improve BP or blood lipid values. Review protocol: PROSPERO CRD42019138998.