bluuebunny/crossref_metadata_2025_split huggingface dataset:
An econometric analysis of electricity consumption and real sector performance in Nigeria
Authors: Chitedze Isaac , Nwedeh Chukwuemeka Cosmas Nwedeh , Adeola Adenikinju , Abonyi Donald Chidera Chidera 
Published: May 2021

Purpose
The purpose of this paper is to examine the extent at which electricity consumption (EC) has contributed to real sector performance, to identify energy-dependent sectors of the economy for appropriate sector-specific policy interventions and to avoid energy conservation policies that may retard the growth of the real sector and economic growth in general.

Design/methodology/approach
This paper used time series data, covering the period between 1981 and 2015. Various time series econometric analyses such as unit root test for stationarity and vector autoregressive and vector error correction models were used to establish the long-run and short-run co-integration relationship among the variables.

Findings
This study finds that EC displays a little and insignificant impact on manufacturing sector output, as well as agriculture and service outputs. The empirical result from causality test suggests a unidirectional causality running from agriculture to EC, as well as service sector to EC, whereas bidirectional causality runs between EC and manufacturing sector. This study therefore recommends adequate power supply to the manufacturing sector, while energy efficiency policy and regulatory reform should address agriculture and service sectors.

Originality/value
Few studies have examined the impact of EC on disaggregated gross domestic product. This research gap has strong policy implications on Nigerian economy as the output of real sector plays vital role in driving the economy. Given the pressing needs for Nigeria to boost real sector output and be among the world’s 20 largest economies by 2030, it becomes imperative for this sector-specific research to be conducted to ensure that sectoral purpose-driven energy interventions are formulated to address power supply challenges in the real sector.
Retail change in a context of an overtourism city. The case of Lisbon
Authors: Guimarães Pedro 
Published: May 2021

Purpose
The excess of tourism in some destinations has led to the discussion of overtourism. One of the sectors that most interacts with tourism is retail, a key element in the experience lived by tourists. The purpose of this paper is to analyse how retail evolves in a context of an overtourism city, how it relates with touristification and what are the elements that best characterise such evolution and relation.

Design/methodology/approach
This research is based on a case study, using the main historic city centre of Lisbon for that purpose. Fieldwork was developed by the author to collect information about the commercial fabric and its main characteristics.

Findings
The findings show a clear adaptation of the commercial fabric of the analysed area to the tourism industry. Furthermore, the author unfolded that the change of retail is towards a consumption environment based on leisure, involving the adaptation of the public space into terraces, and on the thematisation of stores, using elements seen as “authentically” Portuguese, which bestows on theses spaces a sort of certification of quality and authenticity.

Originality/value
The mere reference to the homogenisation of the retail fabric is too simple to explain the richness and variety of elements imbedded in the process of retail change in a context of excessive tourism and touristification. In this paper, the author produced novel knowledge by analysing the elements that embody the evolution of retail in such a context.
Role of signaling in issuance of sukuk versus conventional bonds – an empirical analysis of the bond market in the UAE
Authors: Majumdar Sudipa , Puthiya Rashita 
Published: May 2021

PurposeThe global sukuk market has seen widespread innovations in the last couple of decades, which helped sukuk develop into one of the most acceptable Islamic instruments for raising finance. According to the State of the Global Islamic Economy Report (2018–19), United Arab Emirates (UAE) is ranked second among Islamic economies and Nasdaq Dubai is credited to be the leading international center for sukuk listings (Thomson Reuters, 2018). However, there has been limited research studies on this financing option within the region. To the best of the authors’ knowledge, this study is the first to focus on the role of signaling theory driving the financing choice for listed entities in the UAE. The paper aims to make a significant contribution in light of the recent expansion of sukuk issuances and fills the lacuna in research carried out in the UAE bond market.Design/methodology/approachThis study empirically tested the hypotheses on a data set that covered a sample of 1,354 bond issuances over the period 2008–2019. The authors used logistic regression to distinguish between the issuance of sukuk versus conventional bond. Sukuk structuration leads to information asymmetry that prompts firms to send signals to the capital market. Information asymmetry has been studied in terms of issue-specific (maturity and issue size) and issuer-specific (firm size, growth, profitability, leverage) variables. Two control variables were included to capture the years under study and the macroeconomic effects of economic slowdown.FindingsThe banking sector accounted for 93% of bond issuances but contributed only 63% of the bond market in the UAE in terms of issue size. The data evidenced that non-banking sukuk issuances expanded over the years, with participation from sectors like real estate, oil and gas, logistics and utilities and contributed 50% of issuances in the UAE sukuk market. Typically, firms with smaller asset sizes and higher financing requirements were found to favour sukuk. The banking sector revealed irrelevance of information asymmetry, as Islamic Banks were mandated to issue sukuk. Non-financial firms with high profits and high debts were prompted to prefer conventional bonds, in line with the adverse selection mechanism.Originality/valueAlthough UAE’s sukuk market has existed for more than a decade, scant research has been carried out. Few studies exist for the GCC region that either concentrated on stock market reactions to issuances of Islamic versus conventional bonds or studied capital market characteristics of non-financial entities alone. This is the first study to focus on signaling theory and information asymmetry playing a role in the capital structure of all listed firms (banking and non-banking) issuing bonds in the UAE.
The effect of personality traits and tax morale on tax evasion intention
Authors: Owusu Godfred Matthew Yaw , Bart-Plange Mary-Ann , Koomson Theodora Aba Abekah , Arthur Miriam 
Published: May 2021

Purpose
This paper aims to explore the relationship among personality traits, tax morale and tax evasion intention of students. Using the five-factor model of personality ratings, this study hypothesizes that agreeableness, openness to experience, conscientiousness, extraversion and neuroticism are good predictors of both tax morale and tax evasion intentions of individuals. Further, this paper argues that tax morale correlates negatively with tax evasion intention.

Design/methodology/approach
A survey method was adopted and questionnaires were developed to elicit responses for the study. The study hypotheses were tested structurally using the partial least square-structural equation modelling technique.

Findings
The results of the study demonstrate the existence of a positive and statistically significant relationship between three dimensions of the personality traits (agreeableness, conscientiousness and openness to experience) and tax morale. Consistent with the expectation, the study also finds tax morale to be significant and negatively associated with tax evasion intention.

Research limitations/implications
This study concludes from the findings that improving the tax morale of individuals could be an important way by which tax authorities can improve voluntary tax compliance and reduce the incidence of tax evasion by individuals.

Originality/value
The study uses all the dimensions of the five-factor model to examine the tax evasion intention of individuals. It also contributes to the theoretical literature by highlighting the mediating role of tax morale in the relationship between personality traits and tax evasion intention from an African perspective.
A 1.8 V high-speed 8-bit hybrid DAC with integrated rail-to-rail buffer amplifier in CMOS 180 nm
Authors: Idros Norhamizah , Rosli Alia , Abdul Aziz Zulfiqar Ali , Rajendran Jagadheswaran , Marzuki Arjuna 
Published: May 2021

Purpose
The purpose of this paper is to present the performance of an 8-bit hybrid DAC which is suitable for wireless application or part of a built-in test block for ADC. The hybrid architecture used is the combination of thermometer coding and binary-weighted resistor architectures.

Design/methodology/approach
The conventional DAC topology performance tends to degrade at high-resolution applications. A hybrid topology, which combines an equal number of bits of thermometer coding and binary-weighted resistor architectures operating at higher sampling frequency, was proposed in this work. The die was fabricated in 180 nm CMOS process technology with a supplied voltage of 1.8 V.

Findings
Measured results showed that the DNL and INL errors are within −1 to +1 LSB and −0.9 to +0.9 LSB, respectively for the input range of 0.9 V at the clock rate of 200 MHz, and this DAC was proven monotonic. This 0.068 mm2 DAC consumed 12.6 mW for the data conversion.

Originality/value
This paper is of value in showing the equal division of bits from thermometer coding and binary-weighted resistor architectures provides smaller die size and enhances the performance of hybrid DAC, in terms of linearity, which are DNL and INL errors and guarantees monotonicity at higher sampling frequency.
Poor resource capital of micro-entrepreneurs: the mediating role of entrepreneurial orientation
Authors: Khan Eijaz Ahmed , Hossain Mohammad Alamgir , Jahed Mohammed Abu , Rowe Anna Lee 
Published: May 2021

PurposeUnderstanding the micro-start-up resources and its relationships with entrepreneurial orientation and performance is unique because it operates a business in a poor resource setting. However, poor resource settings of micro-start-up are not adequately examined into the literature in relation to entrepreneurial orientation and performance. Therefore, grounded on resource-based view, this paper aims to attempt to examine the relationships between resource capital, entrepreneurial orientation and performance in a developing country context.Design/methodology/approachTo establish this, the authors conducted a survey among 180 micro-entrepreneurs from Bangladesh and analyzed the data using the partial least squares structural equation modeling (PLS-SEM) approach.FindingsThe results demonstrate the mediating role of entrepreneurial orientation on the relationship between human and financial resources and performance, while having partial mediating influence between social resource and performance, therefore indicating the importance of resources for determining business outcomes for micro-entrepreneurs.Research limitations/implicationsThese results extend theoretical explanations of micro-entrepreneurship within the poor resource setting context. The findings have implications for identifying micro-firms likely to succeed for the purpose of strategic allocation of resources and supports; they also provide future research avenues.Originality/valueTo the best of the authors’ knowledge, no previous study has established that entrepreneurial orientation plays a critical and mediating role between resource capital and micro-firm performance in a poor resource setting.
A Taguchi approach for optimization of design parameters on Rayleigh-Bénard convection in water-based Al2O3 nanofluids
Authors: Choudhary Rajesh , Sharma Naveen , Subudhi Sudhakar 
Published: May 2021

Purpose
This study aims to deal with the optimization of experimental parameters to obtain maximum heat transfer rate in a Rayleigh–Bénard enclosure filled with the water-based Al2O3 nanofluids using the Taguchi method.

Design/methodology/approach
The particle size and particle concentration of the Al2O3 nanoparticles are 40 nm and 0.01 Vol. %, respectively. A two-step approach has been used to prepare the nanofluids of the required concentration by mixing the nanoparticles in the distilled water (DW). A Rayleigh–Bénard enclosure, having a hot bottom and a cold top copper plate with insulated side walls, is used for the experiments. Experiments have been conducted first with the DW, for the validation of experimental facility, and second with nanofluid (Al2O3 + DW), for the heat transfer improvement, at three different values of enclosure aspect ratios (ratio of height to width of an enclosure), i.e. 0.5, 1.0 and 1.5.

Findings
Signal-to-noise ratio (SNR) analysis has been used to determine the optimal levels of design parameters and their contribution toward heat transfer augmentation. The heat transfer, i.e. Nusselt number, is determined for L9 (33) orthogonal array designed by Taguchi method along with corresponding SNR values. The SNR values are plotted for DW and nanofluid to study the effect of different parameters and to identify their optimal levels. It was found that the aspect ratio has the maximum contribution ratio of 78% for the nanofluid and 76.12% for the DW, followed by the heat flux and the height.

Originality/value
The present results demonstrated the great reliability of the Taguchi method in the optimization of the thermal system to save the time and cost of experiments.
Optimization of injection parameters for ethanol blends of plastic oil in VCR engine using RSM and ANN
Authors: Yellapragada Datta Bharadwaz , Budda Govinda Rao , Vadavelli Kavya 
Published: May 2021

Purpose
The present work aims at improving the performance of the engine using optimized fuel injection strategies and operating parameters for plastic oil ethanol blends. To optimize and predict the engine injection and operational parameters, response surface methodology (RSM) and artificial neural networks (ANN) are used respectively.

Design/methodology/approach
The engine operating parameters such as load, compression ratio, injection timing and the injection pressure are taken as inputs whereas brake thermal efficiency (BTHE), brake-specific fuel consumption (BSFC), carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx) and smoke emissions are treated as outputs. The experiments are designed according to the design of experiments, and optimization is carried out to find the optimum operational and injection parameters for plastic oil ethanol blends in the engine.

Findings
Optimum operational parameters of the engine when fuelled with plastic oil and ethanol blends are obtained at 8 kg of load, injection pressure of 257 bar, injection timing of 17° before top dead center and blend of 15%. The engine performance parameters obtained at optimum engine running conditions are BTHE 32.5%, BSFC 0.24 kg/kW.h, CO 0.057%, HC 10 ppm, NOx 324.13 ppm and smoke 79.1%. The values predicted from ANN are found to be more close to experimental values when compared with the values of RSM.

Originality/value
In the present work, a comparative analysis is carried out on the prediction capabilities of ANN and RSM for variable compression ratio engine fuelled with ethanol blends of plastic oil. The error of prediction for ANN is less than 5% for all the responses such as BTHE, BSFC, CO and NOx except for HC emission which is 12.8%.
Organoarsenical tolerance in Sphingobacterium wenxiniae, a bacterium isolated from activated sludge
Authors: Chen Jian , Zhang Jun , Rosen Barry P. 
Published: May 2021

SummaryOrganoarsenicals enter the environment from biogenic and anthropogenic sources. Trivalent inorganic arsenite (As(III)) is microbially methylated to more toxic methylarsenite (MAs(III)) and dimethylarsenite (DMAs(III)) that oxidize in air to MAs(V) and DMAs(V). Sources include the herbicide monosodium methylarsenate (MSMA or MAs(V)), which is microbially reduced to MAs(III), and the aromatic arsenical roxarsone (3‐nitro‐4‐hydroxybenzenearsonic acid or Rox), an antimicrobial growth promoter for poultry and swine. Here we show that Sphingobacterium wenxiniae LQY‐18T, isolated from activated sludge, is resistant to trivalent MAs(III) and Rox(III). Sphingobacterium wenxiniae detoxifies MAs(III) and Rox(III) by oxidation to MAs(V) and Rox(V). Sphingobacterium wenxiniae has a novel chromosomal gene, termed arsU1. Expressed in Escherichia coli arsU1 confers resistance to MAs(III) and Rox(III) but not As(III) or pentavalent organoarsenicals. Purified ArsU1 catalyses oxidation of trivalent methylarsenite and roxarsone. ArsU1 has six conserved cysteine residues. The DNA sequence for the three C‐terminal cysteines was deleted, and the other three were mutated to serines. Only C45S and C122S lost activity, suggesting that Cys45 and Cys122 play a role in ArsU1 function. ArsU1 requires neither FMN nor FAD for activity. These results demonstrate that ArsU1 is a novel MAs(III) oxidase that contributes to S. wenxiniae tolerance to organoarsenicals.
Collective activation of enacted resilience in managing unthought‐of situations: An examination of the reconstruction of a critical situation on the polar traverse
Authors: Villemain Aude , Lémonie Yannick 
Published: May 2021

AbstractThe purpose of this article is to give a detailed description of how resilience is activated in the case of an unthought‐of event through the study of a critical situation encountered on a polar traverse. The situation studied is that of diesel freezing during the return of the 56th polar traverse. Seven raiders participated in the study. Activity traces, such as traverse diary reports, and self‐confrontation interviews were used to reconstruct the event. The results show the need to (a) study repeated failed attempts at solving problems and the need to discuss solutions based on (b) shared or (c) personal experience in finding creative solutions to problems. In this sense, the activation of resilience is a process enabling the transition from habitual adaptive actions to a transformative collective activity. The management of unthought‐of situations is discussed in relation with the expansive learning and transformative actions. Implications are developed in a final section.
Catholicism and Taki Onqoy in the Early Colonial Period: Colonial Entanglements of Church Interments at Iglesiachayoq (Chicha‐Soras Valley, Ayacucho, Peru)
Authors: Norman Scotti M. 
Published: May 2021

ABSTRACTArchaeologists of colonial encounters utilize the concept of entanglement to explore shifting cultural relationships between European and Native populations during colonial encounters. In the chaotic decades after Spanish conquest of Peru (1532), Andeans of the south‐central highlands practiced a revitalization cult known as Taki Onqoy (Quechua: “dancing/singing sickness”). Taki Onqoy preachers advocated for a rejection of Spanish food, culture, and religion in favor of a return to veneration of the local deities practiced prior to Spanish invasion. Based on results from excavation of the Catholic church at the site of Iglesiachayoq (Chicha‐Soras Valley, Ayacucho, Peru), this article explores the burial practices of individuals interred beneath the church floor. Contrary to primary documents, which portray Andeans as idolatrous rebels or pious converts, interments displayed an array of entangled practices. Within the milieu of contrasting religious mandates (Catholic and Taki Onqoy), individuals interred their deceased kin in ways that intertwined both traditions.
The future direction of imaging in prostate cancer: MRI with or without contrast injection
Authors: Pecoraro Martina , Messina Emanuele , Bicchetti Marco , Carnicelli Giorgia , Del Monte Maurizio , Iorio Beniamino , La Torre Giuseppe , Catalano Carlo , Panebianco Valeria 
Published: May 2021

AbstractBackgroundMultiparametric MRI (mpMRI) is the “state of the art” management tool for patients with suspicion of prostate cancer (PCa). The role of non‐contrast MRI is investigated to move toward a more personalized, less invasive, and highly cost‐effective PCa diagnostic workup.ObjectiveTo perform a non‐systematic review of the existing literature to highlight strength and flaws of performing non‐contrast MRI, and to provide a critical overview of the international scientific production on the topic.Materials and MethodsOnline databases (Medline, PubMed, and Web of Science) were searched for original articles, systematic review and meta‐analysis, and expert opinion papers.ResultsSeveral investigations have shown comparable diagnostic accuracy of biparametric (bpMRI) and mpMRI for the detection of PCa. The advantage of abandoning contrast‐enhanced sequences improves operational logistics, lowering costs, acquisition time, and side effects. The main limitations of bpMRI are that most studies comparing non‐contrast with contrast MRI come from centers with high expertise that might not be reproducible in the general community setting; besides, reduced protocols might be insufficient for estimation of the intra‐ and extra‐prostatic extension and regional disease. The mentioned observations suggest that low‐quality mpMRI for the general population might represent the main shortage to overcome.DiscussionNon‐contrast MRI future trends are likely represented by PCa screening and the application of artificial intelligence (AI) tools. PCa screening is still a controversial topic; bpMRI has become one of the most promising diagnostic applications, as it is a more sensitive test for PCa early detection, compared to serum PSA level test. Also, AI applications and radiomic have been the object of several studies investigating PCa detection using bpMRI, showing encouraging results.ConclusionToday, the accessibility to MRI for early detection of PCa is a priority. Results from prospective, multicenter, multireader, and paired validation studies are needed to provide evidence supporting its role in the clinical practice.
Subretinal fluid morphology in chronic central serous chorioretinopathy and its relationship to treatment: a retrospective analysis on PLACE trial data
Authors: Subhi Yousif , Bjerager Jakob , Boon Camiel J.F. , van Dijk Elon H.C. 
Published: May 2021

AbstractPurposeTo explore subretinal fluid (SRF) morphology in chronic central serous chorioretinopathy (cCSC) after one session of either high‐density subthreshold micropulse laser (HSML) treatment or half‐dose photodynamic therapy (PDT).MethodsWe retrospectively obtained optical coherence tomography (OCT) scans from a subset of patients from a randomized controlled trial on treatment‐naïve eyes with cCSC allocated to either HSML treatment or half‐dose PDT. OCT scans were evaluated prior to treatment and 6–8 weeks post‐treatment, where we measured maximum SRF height and width, calculated the maximum height‐to‐maximum width‐ratio (maxHWR) and calculated the total SRF volume.ResultsForty‐one eyes of 39 cCSC patients were included. SRF morphology ranged from flat to dome‐shaped, quantified as maxHWR ranging between 0.02 and 0.12. SRF volume was median 0.373 μl (range: 0.010–4.425 μl) and did not correlate to maxHWR (rho = −0.004, p = 0.982). Half‐dose PDT was superior to HSML treatment in complete SRF resolution (RR = 3.28, p = 0.003) and in morphological changes of SRF (Δmaximum height, p = 0.001; Δmaximum width, p < 0.001; Δvolume, p = 0.025). SRF resolved completely in 19/22 PDT‐treated eyes (86%) and 5/19 HSML‐treated eyes (26%). SRF volume increased in five eyes (26%) after HSML treatment, and in none of the eyes after half‐dose PDT. SRF morphology at baseline did not predict treatment outcomes.ConclusionSRF morphology changed after both HSML treatment and half‐dose PDT in cCSC, with SRF disappearing in most PDT‐treated patients, whereas SRF volume increased in a sizeable proportion of HSML‐treated patients. Baseline SRF characteristics measured in this study were unable to predict outcomes after either HSML treatment or half‐dose PDT.