bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of magnetic field and nanoparticle shape on jet impingement over stationary and vibrating plates
Authors: Nimmagadda Rajesh , Lazarus Godson Asirvatham , Wongwises Somchai 
Published: July 2019

Purpose
The purpose of this study is to numerically investigate the effect of jet impingement, magnetic field and nanoparticle shape (sphericity) on the hydrodynamic/heat transfer characteristics of nanofluids over stationary and vibrating plates.

Design/methodology/approach
A two-dimensional finite volume method-based homogeneous heat transfer model has been developed, validated and used in the present investigation. Three different shapes of non-spherical carbon nanoparticles namely nanotubes, nanorods and nanosheets are used in the analysis. Sphericity-based effective thermal conductivity of nanofluids with Brownian motion of nanoparticles is considered in the investigation. Moreover, the ranges of various comprehensive parameters used in the study are Re = 500 to 900, St = 0.0694 to 0.2083 and Ha = 0 to 80.

Findings
The hydrodynamic/heat transfer performance of jet impingement in the case of vibrating plate is 298 per cent higher than that of stationary plate at Re = 500. However, for the case of vibrating plate, a reduction in the heat transfer performance of 23.35 per cent is observed by increasing the jet Reynolds number from 500 to 900. In the case of vibrating plate, the saturation point for Strouhal number is found to be 0.0833 at Re = 900 and Ha = 0. Further decrement in St beyond this limit leads to a drastic reduction in the performance. Moreover, no recirculation in the flow is observed near the stagnation point for jet impingement over vibrating plate. It is also observed that the effect of magnetic field enhances the performance of jet impingement over a stationary plate by 36.18 per cent at Ha = 80 and Re = 900. Whereas, opposite trend is observed for the case of vibrating plate. Furthermore, at Re = 500, the percentage enhancement in the Nuavg values of 3 Vol.% carbon nanofluid with nanosheets, nanorods and nanotubes are found to be 47.53, 26.86 and 26.85 per cent when compared with the value obtained for pure water.

Practical implications
The present results will be useful in choosing nanosheets-based nanofluid as the efficient heat transfer medium in cooling of high power electronic devices. Moreover, the obtained saturation point in the Strouhal number of the vibrating plate will help in cooling of turbine blades, as well as paper and textile drying. Moreover, the developed homogeneous heat transfer model can also be used to study different micro-convection phenomena in nanofluids by considering them as source terms in the momentum equation.

Originality/value
Impingement of jet over two different plate types such as stationary and vibrating is completely analyzed with the use of a validated in-house FVM code. A complete investigation on the influence of external magnetic field on the performance of plate type configuration is evaluated. The three fundamental shapes of carbon nanoparticles are also evaluated to obtain sphericity based hydrodynamic/heat transfer performance of jet impingement.
A multi-factor methodology for evaluation and optimization of plate-fin recuperators for micro gas turbine applications considering payback period as universal objective function
Authors: Maghsoudi Peyman , Sadeghi Sadegh , Xiong Qingang , Aminossadati Saiied Mostafa 
Published: July 2019

Purpose
Because of the appreciable application of heat recovery systems for the increment of overall efficiency of micro gas turbines, promising evaluation and optimization are crucial. This paper aims to propose a multi-factor theoretical methodology for analysis, optimization and comparison of potential plate-fin recuperators incorporated into micro gas turbines. Energetic, exergetic, economic and environmental factors are covered.

Design/methodology/approach
To demonstrate applicability and reliability of the methodology, detailed thermo-hydraulic analysis, sensitivity analysis and optimization are conducted on the recuperators with louver and offset-strip fins using a genetic algorithm. To assess the relationship between investment cost and profit for the recuperated systems, payback period (PBP), which incorporates all the factors is used as the universal objective function. To compare the performance of the recuperated and non-recuperated systems, exergy efficiency, exergy destruction and corresponding cost rate, fuel consumption and environmental damage cost rates, capital and operational cost rates and acquired profit rates are determined.

Findings
Based on the results, optimal PBP of the louvered-fin recuperator (147 days) is slightly lower than that with offset-strip fins (153 days). The highest profit rate is acquired by reduction of exergy destruction cost rate and corresponding decrements for louver and offset-strip fins are 2.3 and 3.9 times compared to simple cycle, respectively.

Originality/value
This mathematical study, for the first time, focuses on introducing a reliable methodology, which covers energetic, exergetic, economic and environmental points of view beneficial for design and selection of efficient plate-fin recuperators for micro gas turbine applications.
Understanding the determinants of guests’ behaviour to use green P2P accommodation
Authors: Agag Gomaa 
Published: July 2019

Purpose
This study aims to develop and empirically test a comprehensive framework in which to understand the determinants of guests’ behavior to use green peer-to-peer (P2P) accommodation in the UK P2P context by emerging the theory of planed behavior, environmental commitment theory and the value-belief-norm (VBN) theory into one model.

Design/methodology/approach
Adopting a quantitative approach, the present study proposes an integrated model integrating theory of planed behavior, environmental commitment theory and the VBN theory and subsequently tests the model using structural equation modeling data analysis. Data collected from 721 respondents were analyzed through (AMOS) to test the proposed model.

Findings
The results indicate that our integrated framework demonstrates a favorable level of prediction power for guests’ behavior, which verified the superiority of the suggested framework. Furthermore, the findings verified the moderating impact of guest attributes on guests decision regarding the booking process.

Practical implications
This study contributes to the existing theory and practice by offering important insights about determinants of guests’ behavior to use green P2P accommodation in the UK P2P context.

Originality/value
This research was the first to explore the determinants of guests’ behavior to use green P2P accommodation in the UK P2P context.
Psychological distress constructs in police with different roles
Authors: Sheard Isobel , Burnett Melissa Ellen , St Clair-Thompson Helen 
Published: July 2019

Purpose
Police personnel report relatively high rates of mental health difficulties, and are at an increased risk of experiencing stress, burnout, secondary traumatic stress and anxiety as a result of the nature of their work and may also experience low compassion satisfaction. However, it is likely that the prevalence of psychological distress varies across roles. The purpose of this paper is to explore psychological distress, in a large sample of police personnel, examining differences between individuals in a number of police roles.

Design/methodology/approach
A questionnaire assessing experience of mental health problems, perceived stress, compassion fatigue (burnout and secondary traumatic stress), compassion satisfaction and anxiety was administered to 602 police personnel, who were classified into one of ten roles (24/7 officers, communications, firearms, crime, resolution without deployment, neighbourhood, custody, safeguarding, operations and other roles). Differences based on role and the requirement for shift work were then examined.

Findings
24/7 officers had higher compassion fatigue and lower compassion satisfaction than individuals in a number of other roles. Firearms officers had lower levels of perceived stress and anxiety. Resolution without deployment officers reported higher secondary traumatic stress and compassion fatigue. The findings also revealed that respondents who partake in shift work showed higher levels of perceived stress.

Originality/value
This is the first study to the authors’ knowledge to investigate experience of mental health problems and reports of psychological distress in different roles within a UK police force. The findings have important implications, for example, in terms of identifying groups who may be particularly at risk from psychological distress.
Complexity and leadership: the case of a military organization
Authors: Surace Alberto 
Published: July 2019

Purpose
This paper aims to adopt the complexity theory (CT) as a frame of reference to analyze leadership action within a military organization. Through the CT framework, it considers a military organization as a complex adaptive system (CAS), which evolves and adapts to the environment to survive, similarly to a living organism. This case study identifies complex dynamics, which are proper to CAS and it proposes avenues to harness them to increase organizational performance. Ultimately, this paper provides insights on how a CT framework may be used in describing and understanding an effective leadership action and grant it with mechanisms to measure its effectiveness.

Design/methodology/approach
This paper rests on a single case study, which examines a leadership action in a military organization. Capitalizing on privileged access to top managers of an Air Force’s Major Command, the author carried out tailored surveys aimed at identifying organizational leadership effectiveness.

Findings
Based on these data, the study provides qualitative evidence that suggests a relevant relationship between CT-based leadership action and organizational effectiveness.

Originality/value
The CT-based leadership approach challenges the paradigm of ordered, hierarchical organizational design by proposing a more flexible, networked approach in relation to organizational effectiveness. The complexity-based approach to leadership proposed in this paper suggests an adaptive leadership model that better corresponds to complex human organizations, and helps leaders identify more effective management solutions.
Determinants of information disclosure by Spanish state-owned enterprises in accordance with legal requirements
Authors: Andrades Javier , Martinez-Martinez Domingo , Larrán Manuel , Herrera Jesus 
Published: July 2019

Purpose
The purpose of this paper is to examine how different variables can affect the amount of information reported by Spanish enterprises owned by the central state as well as by local and regional governments, all categorized as state-owned enterprises (SOEs).

Design/methodology/approach
Using, as a reference, the obligations of information disclosure contained in the Spanish Law 19/2013 on Transparency and Good Governance, the authors performed a web-content analysis of web pages of all Spanish SOEs and the authors examined a sample of Spanish enterprises owned by regional and local governments.

Findings
The results show that the amount of information reported by Spanish SOEs is quite reduced and limited. Among the variables examined, the most influential ones for explaining the amount of information reported are the nature of public ownership and the institutional size.

Originality/value
This study contributes to the literature by exploring the potential determinants of the online disclosure of mandatory information reported by enterprises whose ownership is shared by private and public organizations. Thus, this research could help public managers make decisions and improve public confidence.
Fretting wear of the nitrided medium carbon steel under line contact condition at an elevated temperature
Authors: Wang Guanghong , He Guangwei , Qu Shengguan , Li Hao , Zhou Mushun , Zhang Husheng 
Published: July 2019

Purpose
Fretting wear exists widely in the field of matching mechanical parts whereas previous research studies mostly focus on the point contact through a ball-plate tribometer. This paper aims to study the influence of wear debris on the fretting wear characteristics of the nitrided medium carbon steel under line contact condition at elevated temperature.

Design/methodology/approach
Fretting wear behavior of the nitrided medium carbon steel was experimentally investigated under line contact condition at elevated temperature and different normal loads without lubrication. Wear loss, worn surface and wear debris were studied to analyze the wear mechanism of nitrided steel.

Findings
The results showed that surface hardness of the medium carbon steel was notably improved because of the generation of a 230 µm nitrided case. Wear loss increased with the normal load, which was associated with the damage of a thin solid film formed by the wear debris, consisting of iron oxides and chromium oxide rather than only iron or iron oxides. The wear debris became partially amorphous and spherical because it was trapped within the contact interface and was ground, rolled, oxidized under line contact conditions. The spherical wear debris acted as a third body and formed a lubricating film between the contact faces. This lubricating film helped to stabilize the friction coefficient and reduced the wear rate, which further caused the acceleration of wear volume to gradually decrease. The wear mechanisms of the nitrided steel were oxidation wear, abrasive wear and fatigue spalling of the oxide layer.

Originality/value
The findings are helpful to understand the fretting wear behavior of the friction pair under line contact and enrich the fretting tribology theory.
Scottish citizens’ perceptions of the credibility of online political “facts” in the “fake news” era
Authors: Baxter Graeme , Marcella Rita , Walicka Agnieszka 
Published: July 2019

Purpose
The purpose of this paper is to present the results of a study that explored public perceptions of the credibility of “facts and figures” contained within five social media posts produced by political parties in Scotland.

Design/methodology/approach
The study consisted of an online survey conducted in Spring 2017 (n=538). Respondents were asked to gauge the reliability of “facts” contained within the posts, to provide reasons for their answers, and to indicate how they might go about confirming or debunking the figures.

Findings
Less than half the sample believed the posts’ content would be reliable. Credibility perceptions were influenced by various factors, including: a lack of cited sources; concerns about bias or spin; a lack of detail, definitions or contextual information; personal political allegiance and trust; negative campaign techniques; personal experience of policy issues; and more intuitive judgements. Only small numbers admitted that they would not know how to find out more about the issues or would be disinclined to look further. The majority appeared confident in their own abilities to find further information, yet were vague in describing their search strategies.

Originality/value
Relatively little empirical research has been conducted exploring the perceived credibility of political or government information online. It is believed that this is the first such study to have specifically investigated the Scottish political arena.
Sport entrepreneurship and public policy: future trends and research developments
Authors: Ratten Vanessa 
Published: July 2019

Purpose
The purpose of this paper is to overcome the traditional general approach to sport policy by taking an entrepreneurial perspective. This helps link the fragmented literatures of entrepreneurship, public policy and sport entrepreneurship in order to develop a new perspective of sport entrepreneurship and public policy.

Design/methodology/approach
A literature review is conducted that highlights the need for public policy to focus on entrepreneurship in sports contexts.

Findings
In the past, sport policy focused more on governance and political elements but these can be embedded into a policy entrepreneurship perspective regarding sport. This helps to redefine and bridge the literature on sport entrepreneurship and public policy.

Originality/value
Most sport policy research has tended to take a more organizational behavior or political science approach. Thus, this paper takes a new perspective by incorporating the nascent sport entrepreneurship literature into public policy debates. This is helpful to public policy planners but also sports managers who need to work together to build better policy initiatives.
Is all that glitters gold? A look at Fortune magazine’s 100 Fastest-Growing Companies
Authors: Garcia Anthony Thomas , Loviscek Anthony , Xie Kangzhen 
Published: July 2019

Purpose
Does Fortune magazine’s list of the 100 Fastest-Growing Companies have information content; that is, is the list a source for market-beating performance? The paper aims to discuss this issue.

Design/methodology/approach
Using data for 26 annual periods, 1991–2016, the paper examines the top 5, 10, 25, 50 and all 100 stocks on a return-risk basis, including an application of Modern Portfolio Theory. To generate portfolio performance metrics, the study uses conventional mean-variance analysis, which includes the estimation of returns and risks, where risk will be measured by standard deviation and β. To arrive at the performance metrics and to determine whether information content is embedded in the list, the study reviews a series of tests. Because Fortune ranks the companies from 1 to 100, the data can be used to test if information content is displayed in sub-groups, such as in the first five to ten companies, even if it does not exist in the 100-stock portfolios.

Findings
The study finds that the returns are not high enough nor are the risks low enough statistically to conclude the existence of significant information content.

Research limitations/implications
As part of the authors’ efforts to move to the population of 2,600 firms as closely as possible, the authors use “delisting” returns from CRSP on 120 firms to account for missing observations, with a final sample size of 2,594 firms.

Practical implications
The evidence indicates that investors drawn to Fortune’s “100 Fastest-Growing Companies” should view them skeptically as a source for an effective stock selection strategy.

Originality/value
On the basis of the results of this study, readers will conclude that subscribers drawn to Fortune’s “100 Fastest-Growing Companies” should view them skeptically for investment recommendations. From a portfolio perspective, the study is unable to uncover information content that could lead to a market-beating performance, suggesting that the published criteria Fortune uses to select the Fastest-Growing Companies is embedded in the prices of the stocks even before Fortune publishes its list. The study notes that the selection criteria used by Fortune do involve some judgments on the part of the editorial staff (e.g. whether an announced restatement of previously reported financial data appears to have a significant impact), which means that someone who wished to anticipate the publication of the next list of the “Fastest-Growing Companies” would not only have to gather information but would also have to correctly anticipate these judgment calls.
Circulating miR‐146a, miR‐34a and miR‐375 in type 2 diabetes patients, pre‐diabetic and normal‐glycaemic individuals in relation to β‐cell function, insulin resistance and metabolic parameters
Authors: García‐Jacobo Rocío E. , Uresti‐Rivera Edith E. , Portales‐Pérez Diana P. , González‐Amaro Roberto , Lara‐Ramírez Edgar E. , Enciso‐Moreno José A. , García‐Hernández Mariana H. 
Published: July 2019

AbstractThe pathogenesis of type 2 diabetes (T2D) is associated with a progressive loss of pancreatic β‐cell mass. It is known that miR‐146a, miR‐34a, and miR‐375 are involved in β‐cell functionality. In this work, we evaluated the levels of these miRNAs in normal‐glycaemic individuals, pre‐diabetic, and T2D patients in relation to β‐cell functionality, insulin resistance, and metabolic parameters. The relative expression of the miRNAs was evaluated in serum samples by real‐time polymerase chain reaction. In a principal component analysis, we observed that T2D patients and pre‐diabetic individuals were not associated with β‐cell functionality. However, in a correlation matrix analysis, we detected that miR‐34a was related to miR‐146a and insulin resistance. The relative expression of miR‐375 was correlated with cholesterol and low‐density lipoprotein levels. A decrease of β‐cell function in pre‐diabetic individuals and T2D patients was observed. The insulin resistance was higher in pre‐diabetic individuals and T2D patients. The relative expression of miR‐146a in pre‐diabetic individuals, T2D patients with insulin treatment, and T2D patients with nephropathy and diabetic foot was decreased. In addition, miR‐34a was increased in T2D patients who were overweight and obese. The relative expression of miR‐375 was increased in T2D patients with poor glycaemic control, while a decrease was seen in T2D patients with nephropathy and diabetic foot. Circulating miR‐375, miR‐34a, and miR‐146a were not associated with β‐cell functionality, but their expression was differentially affected by glycaemia, obesity, insulin treatment, and the presence of nephropathy and diabetic foot.
A systematic review on outcome reporting in randomised controlled trials on surgical interventions for female stress urinary incontinence: a call to develop a core outcome set
Authors: Doumouchtsis SK , Pookarnjanamorakot P , Durnea C , Zini M , Elfituri A , Haddad JM , Falconi G , Betschart C , Pergialiotis V ,   CHORUS, An International Collaboration for Harmonising Outcomes, Research, and Standards in Urogynaecology and Women's Health (i‐chorus.org)
Published: July 2019

BackgroundSeveral meta‐analyses have identified methodological limitations in female stress urinary incontinence (SUI) trials, precluding the synthesis of primary studies and high‐quality evidence.ObjectivesEvaluation of outcome measure selection and outcome reporting in randomised controlled trials (RCTs) on surgery for SUI.Search strategySystematic review of RCTs identified from bibliographical databases, including Medline, Cochrane, and EMBASE.Selection criteriaRandomised controlled trials evaluating the efficacy and safety of surgical interventions for the management of female SUI.Data collection and analysisTwo researchers independently assessed the included studies and documented outcomes.Main resultsOverall, 108 studies were identified that included 422 reported outcomes and 119 outcome measures. The three most common outcomes were cure rates (87 studies), quality of life (85 studies), and overactive bladder (78 studies). The median methodological quality rating was 3 (range 0–3) and the outcome reporting quality rating was 3 (range 0–5). Multinomial logistic regression analysis revealed that the methodological quality and use of validated questionnaire were significant predictors of the quality of outcome reporting (β = 0.538, P < 0.001; β = 0.218, P = 0.011, respectively).ConclusionsOutcome reporting in SUI trials is highly variable. Until a core outcome set is developed and implemented, we propose an interim use of three commonly reported outcomes in each domain (treatment success rate – complete cure, partial improvement, or failure of response; urodynamic evaluation outcomes – overactive bladder (OAB), voiding dysfunction, and urodynamic stress incontinence; patient‐reported outcomes – quality of life, sexual dysfunction, and patient satisfaction) with the use of validated questionnaires for patient‐reported outcomes and subjective success rates. Complications should be also explicitly and comprehensively reported using validated outcome measures.Tweetable abstractThere is significant variation in outcome reporting in SUI trials. Our systematic review findings aim to form the basis for the development of a core outcome set.