bluuebunny/crossref_metadata_2025_split huggingface dataset:
Do employability skills for business graduates meet the employers’ expectations? The case of retail Islamic banks of Bahrain
Authors: Al-Shehab Noor , AL-Hashimi Mukhtar , Madbouly Araby , Reyad Sameh , Hamdan Allam 
Published: August 2020

PurposeManagers claim that fresh graduates are unequipped to meet market demands. The aim of this study is to investigate the perception of employers in retail Islamic banks of Bahrain on newly graduated business students. The Singaporean Model of Employability Skills was implemented, to ascertain the mean ratings of employability skills in terms of their importance and the competency of business graduates.Design/methodology/approachThis deductive research approach initiated with a literature review that identifies research gap and a model that was tested via a self-administration adopted survey by collected data from 220 senior employees at retail Islamic banks of BahrainFindingsThe systematic of convenience sampling technique was used in selecting 161 samples and the researcher received only 85 completed questionnaire forms. Findings initiate that employers appreciated the importance of teamwork, risk management and decision-making skills. Their main recommendation was that employers should establish a durable bond with universities to enhance employability skills.Originality/valueBecause the researcher gathered all data from employers of different Islamic banks in Bahrain, this sector in addition will get the advantage of the results that banks will formulate their strategic plans accordingly to tackle the business graduates’ weaknesses. Likewise, universities and researchers might be motivated to look into new innovative methods that assist graduates to accommodate with market conditions.
Visualizing online collaborative writing strategies in higher education group assignments
Authors: Sundgren Marcus , Jaldemark Jimmy 
Published: August 2020

PurposeWorking together in groups is a common and emphasized feature in today's society, and higher educational settings often utilize group assignments to enable students to develop collaborative skills. Therefore, the purpose of this article is to describe and analyze applied strategies and the patterns that emerge during students online collaborative writing in higher education group assignments. The research questions that this article aims to answer are (1) which patterns of students online collaborative writing emerge in higher education group assignments and (2) what strategies of online collaborative writing do higher education students apply in group assignments?Design/methodology/approachThis study's design builds on Conversation Analysis to explore visualizations of Google Docs revision history of online collaborative writing documents. Documents from 25 student groups were the basis of the analysis. The visualizations used in this project are produced with the DocuViz Chrome extension.FindingsThe findings suggest that visualizations can provide a quick and fairly accurate estimate of collaborative strategies used when students write together online. Three patterns of document growth were identified, two of which could be directly linked to strategies for collaboration. Cramming patterns are indicative of low collaboration and concentrating patterns with high levels of collaboration.Practical implicationsThe findings provide useful insight for teachers regarding the nature of collaboration taking place during online collaborative writing tasks. By visualizing the revision history, much can be learnt about the nature of the collaboration and of the individual group member's contributions in a student group that otherwise remains largely invisible to the teacher.Originality/valuePrior studies have combined visualizations with extensive analysis of document content. This investigation shows that an examination of the visualization of the document's revision history can be used to draw conclusions about the nature of collaboration during the online writing process.
Impacts of procurement strategies on construction SMEs’ growth
Authors: Windapo Abimbola Olukemi , Olugboyega Oluseye , Odediran Sunday 
Published: August 2020

Purpose
This study aims to investigate the impacts of procurement strategies on the growing proportion of construction small- and medium-sized enterprises (SMEs) and whether the size of the construction company moderates the effect.

Design/methodology/approach
This study adopted a quantitative research approach and a cross-sectional questionnaire survey in achieving its objectives. The survey requires the respondent to identify both the most successful and most outstanding project that the respondent was involved in between 2010 and 2016.

Findings
The study found that only traditional and management-oriented procurement strategies ensure the achievement of all growth plans for construction SMEs in South Africa; and that medium-sized construction enterprises achieve social growth such as community empowerment, managerial skills and advancement on the cidb Register of Contractors.

Practical implications
The findings of the study imply that policymakers should base their decisions regarding macroeconomic issues and growth plans for construction SMEs on the internal and external factors such as differences in the sizes of construction SMEs and differences in the suitability of procurement strategies affecting the growth of construction SMEs.

Originality/value
In past studies, the diversity amongst SMEs is often overlooked and SMEs are erroneously assumed to share similar objectives, possess equal capabilities and face challenges of the same magnitude. The original contribution of this study is shown in the investigation of the moderating effect of SMEs’ diversity (in terms of company size) on their growth proportion as influenced by procurement strategies.
Modeling and simulation of intersection quasi-moving block speed guidance based on connected vehicles
Authors: Xu Qing , Wang Jiangfeng , Wang Botong , Yan Xuedong 
Published: August 2020

Purpose
This study aims to propose a speed guidance model of the CV environment to alleviate traffic congestion at intersections and improve traffic efficiency. By introducing the theory of moving block section for high-speed train control, a speed guidance model based on the quasi-moving block speed guidance (QMBSG) is proposed to direct platoon including human-driven vehicles and connected vehicles (CV) through the intersection coordinately.

Design/methodology/approach
In this model, the green time of the intersection is divided into multiple block intervals according to the minimal safety headway. Connected vehicles can pass through the intersection by following the block interval using the QMBSG model. The block interval is assigned dynamically according to the traveling relation of HV and CV, when entering the communication range of the intersection. To validate the comprehensive guidance effect of the proposed model, a general evaluation function (GEF) is established. Compared to CVs without speed guidance, the simulation results show that the GEF of QMBSG model has an obvious improvement.

Findings
Compared to CVs without speed guidance, the simulation results show that the GEF of QMBSG model has an obvious improvement. Also, compared to the single intersection speed guidance model, the GEF value of the QMBSG model improves over 17.1%. To further explore the guidance effect, the impact of sensitivity factors of the CVs’ environment, such as intersection environment, communication range and penetration rate (PR) is analyzed. When the PR reaches 75.0%, the GEF value will change suddenly and the model guidance effect will be significantly improved. This paper also analyzes the impact of the length of block interval under different PR and traffic demands. It is found that the proposed model has a better guidance effect when the length of the block section is 2 s, which facilitates traffic congestion alleviation of the intersection in practice.

Originality/value
Based on the aforementioned discussion, the contributions of this paper are three-fold. Based on the traveling information of HV/CV and the signal phase and timing plans, the QMBSG model is proposed to direct platoon consisting of HV and CV through the intersection coordinately, by following the block interval assigned dynamically. Considering comprehensively the indexes of mobility, safety and environment, a GEF is provided to evaluate the guidance effect of vehicles through the intersection. Sensitivity analysis is carried out on the QMBSG model. The key communication and traffic parameters of the CV environment are analyzed, such as path attenuation, PR, etc. Finally, the effect of the length of block interval is explored.
Sustaining Indigenous students' and families' well-being and culture in an Ontario school board
Authors: Washington Shaneé Adrienne 
Published: August 2020

PurposeThis paper describes how an Ontario school board's majority First Nation, Metís and Inuit (FNMI) student population influenced the direction and priorities of the board toward culturally responsive and well-being focused initiatives. Using culturally sustaining/revitalizing pedagogy (CSRP) as a conceptual framework, it explores the board's efforts to meet the socioemotional and identity needs of its FNMI students (and families) through investments in professional learning communities (PLCs) and targeted programming and technologies.Design/methodology/approachThis paper presents findings from one case in a larger multi-year (2015–2017), multiple-case (10 school boards) study by a university research team that included the author. Thematic analysis was used to code interviews and focus groups conducted with over 40 administrators, educators and community partners in the board featured in this paper.FindingsThe board's culturally responsive and well-being focused initiatives, while intended to support FNMI students' socioemotional success and sense of inclusiveness in schools, was inadequate at fostering and sustaining students' (and families') cultural survival and communal well-being.Practical implicationsFindings offer practical ways that schools serving large populations of FNMI students might support students' identity development and self-regulation skills in schools while also serving as a cautionary example of strategies that do not sufficiently address student challenges that are the result of ongoing legacies of colonization.Originality/valueThis study provides a distinctive example of a predominantly FNMI school board that, in recent years, has prioritized student well-being and identity development over achievement. It provides insight into the transformative possibilities and constraints of trying to support FNMI students' socioemotional healing and cultural sustenance in a colonized system.
Causal explanations for the evolution of ‘low gear’ locomotion in insular ruminants
Authors: Rozzi Roberto , Varela Sara , Bover Pere , Martin Jeff M. 
Published: August 2020

AbstractAimMammals on islands often undergo remarkable evolutionary changes. The acquisition of ‘low gear’ locomotion, namely short and robust limb elements, has been typically associated with the island syndrome in large mammals and, especially, ruminants. Here we provide an investigative framework to examine biotic and abiotic selective factors hypothesized to influence evolution of this peculiar type of gait.LocationIslands worldwide.TaxonBovidae.MethodsWe calculated response variables associated with ‘low gear’ locomotion in 21 extinct and extant insular bovids. We assembled data on the physiography of 11 islands and on life history and ecological traits of the focal taxa. We estimated 10 predictors (island area and four topographic indices, body mass, body size divergence, number of predators and competitors, large mammal richness) and used multiple regressions, regression trees, and random forests to assess their contextual importance.ResultsThe acquisition of ‘low gear’ locomotion generally happens on islands with a small number of competitors. However, the roughness of the island terrain appears to be also important, without being a main driver. Finally, although the most extreme cases of ‘low gear’ locomotion occurred on islands with no mammalian predators, our models show a non‐significant relationship with this factor.Main conclusionsThe evolution of ‘low gear’ locomotion in insular ruminants does not simply result from phyletic dwarfing and predatory release. Variation in morphological responses within Bovidae to ecological and topographic traits suggests, instead, a complex interplay of biotic and abiotic factors. Current understanding on the main drivers of species evolutionary pathways and biogeographic patterns are disproportionally based on few taxa, mainly vertebrates, and in some extreme cases (like this one) even on few species. Here we show how adding more data, even within the same taxonomic group, can challenge historically accepted macroevolutionary and macroecological concepts.
Critical Europeans in an Age of Crisis: Irish and Portuguese Protesters' EU Perceptions
Authors: Moore Madelaine , Trommer Silke 
Published: August 2020

AbstractThis article examines Irish and Portuguese protesters' perceptions of the EU in the decade since the European debt crisis. Building on EU politics, social movement and protest literatures, we ask how domestic protesters in both countries perceive the EU during its age of crisis protest timescape. We find that critical Europeanism, which rejects technocratic and neoliberal Europe and works towards an alternative, social Europe, has travelled beyond austerity/bailout protests into women's rights and housing protests in both countries, although to varying degrees. We suggest that the expansion of critical European perceptions in these traditionally Europhile member states forms part of the social and political legacy of the European debt crisis, but also contributes to the continued Europeanization of the European social movement space. It could have positive impacts on the EU's legitimacy deficit if EU institutions engaged meaningfully with critical European voices.
Experimental Analysis of Salt Hydrate Latent Heat Thermal Energy Storage System With Porous Aluminum Fabric and Salt Hydrate as Phase Change Material With Enhanced Stability and Supercooling
Authors: Kumar Navin , Ness Ryan Von , Chavez Reynaldo , Banerjee Debjyoti , Muley Arun , Stoia Michael 
Published: August 2020

Abstract
Phase change materials (PCMs), especially salt hydrates possess high volumetric energy storage capacity in their transition temperature range. These materials are used in applications where it is necessary to store thermal energy due to temporary load shift between demand and availability. Thus, possible applications are HVAC, recovery of waste heat, and defense thermal management. Despite salt hydrates potential, the practical feasibility of latent heat storage with salt hydrates is limited due to low power rating, supercooling, phase segregation, and long-term stability. Its low power rating and long-term stability limits its application in most applications. This work experimentally validates the stability and thermal performance of a compact heat exchanger charged with salt hydrate during melting and freezing. The compact heat exchanger was designed with fins on both the heat transfer fluid (HTF) and salt hydrate PCM side. The thermal performance of the latent heat thermal energy storage system (LHTESS) was evaluated for various operating conditions. The results show that LHTESS could achieve an average heat transfer coefficient of 124 and 87 W/(m2 K) during melting and solidification, respectively. The stability of the system in suppressing supercooling was validated over 800 cycles with nucleating agent and active homogenous nucleation techniques. The supercooling was reduced to 3 °C with zinc hydroxyl nitrate as nucleating agent and less than 1 °C with the active homogenous nucleation technique. The LHTESS showed less than 6% degradation in energy storage capacity over 800 cycles.
Shock–Boundary Layer-Interaction Control Through Recirculation in a Hypersonic Inlet
Authors: Ruban Alex , Menezes Viren , Balasubramanian Sridhar , Srinivasan K. 
Published: August 2020

Abstract
This technical brief presents a flow separation mitigation device, called cavity-recirculator that can be used to control flow separation during shock wave–boundary layer interaction (SBLI) in high-speed intake flows. The cavity-recirculator isolates the flow separation bubble generated at the SBLI spot, thereby thinning the boundary layer and reducing the blockage of the inviscid stream in the duct. The device has a potential application in scramjet engine intakes/isolators. The cavity-recirculator was tested on a single-ramp-compression intake model in a hypersonic shock tunnel, in a freestream of Mach 8 (±0.1). The device operation and effectiveness were assessed by flow visualization and pressure measurements in the test model. The measurements and visualization displayed a mitigation of flow separation through an improved flow field with a single shock train and the absence of flow separation shock, in the inlet.
X-Ray Microtomography System Applied in Characterization of Lightweight Concrete Structures
Authors: Bastos Luan F. , de Araújo Olga M. O. , Machado Alessandra S. , Oliveira Davi F. , Lopes Ricardo T. 
Published: August 2020

Abstract
Microtomography is a powerful non-destructive method that allows the visualization of the internal structure of the object and makes possible to generate internal graphic models of the object. Concrete is a mixture widely used in the construction industry due to the union between its mechanical properties with the low cost for its production. The application of X-ray microtomography in lightweight concrete structures allows the visualization of the layout and formation of existing internal structures. In this work, it was possible to identify the presence of ethyl vinyl acetate (EVA) and piaçava fibers in the internal structure of the samples and to classify the high-density aggregates according to the ASTM C125-18 standard, as well as to evaluate the influence of the light aggregates in the increasing of the total porosity.
Molecular Structure and Functional Analysis of Pyocin S8 from Pseudomonas aeruginosa Reveals the Essential Requirement of a Glutamate Residue in the H-N-H Motif for DNase Activity
Authors: Turano Helena , Gomes Fernando , Domingos Renato M. , Degenhardt Maximilia F. S. , Oliveira Cristiano L. P. , Garratt Richard C. , Lincopan Nilton , Netto Luis E. S. 
Published: August 2020

ABSTRACT
Multidrug resistance (MDR) is a serious threat to public health, making the development of new antimicrobials an urgent necessity. Pyocins are protein antibiotics produced by Pseudomonas aeruginosa strains to kill closely related cells during intraspecific competition. Here, we report an in-depth biochemical, microbicidal, and structural characterization of a new S-type pyocin, named S8. Initially, we described the domain organization and secondary structure of S8. Subsequently, we observed that a recombinant S8 composed of the killing subunit in complex with the immunity (ImS8) protein killed the strain PAO1. Furthermore, mutation of a highly conserved glutamic acid to alanine (Glu100Ala) completely inhibited this antimicrobial activity. The integrity of the H-N-H motif is probably essential in the killing activity of S8, as Glu100 is a highly conserved residue of this motif. Next, we observed that S8 is a metal-dependent endonuclease, as EDTA treatment abolished its ability to cleave supercoiled pUC18 plasmid. Supplementation of apo S8 with Ni2+ strongly induced this DNase activity, whereas Mn2+ and Mg2+ exhibited moderate effects and Zn2+ was inhibitory. Additionally, S8 bound Zn2+ with a higher affinity than Ni2+ and the Glu100Ala mutation decreased the affinity of S8 for these metals, as shown by isothermal titration calorimetry (ITC). Finally, we describe the crystal structure of the Glu100Ala S8 DNase-ImS8 complex at 1.38 Å, which gave us new insights into the endonuclease activity of S8. Our results reinforce the possibility of using pyocin S8 as an alternative therapy for infections caused by MDR strains, while leaving commensal human microbiota intact.
IMPORTANCE Pyocins are proteins produced by Pseudomonas aeruginosa strains that participate in intraspecific competition and host-pathogen interactions. They were first described in the 1950s and since then have gained attention as possible new antibiotics. However, there is still only scarce information about the molecular mechanisms by which these molecules induce cell death. Here, we show that the metal-dependent endonuclease activity of pyocin S8 is involved with its antimicrobial action against strain PAO1. We also describe that this killing activity is dependent on a conserved Glu residue within the H-N-H motif. The potency and selectivity of pyocin S8 toward a narrow spectrum of P. aeruginosa strains make this protein an attractive antimicrobial alternative for combatting MDR strains, while leaving commensal human microbiota intact.
Functions of the BamBCDE Lipoproteins Revealed by Bypass Mutations in BamA
Authors: Hart Elizabeth M. , Silhavy Thomas J. 
Published: August 2020

ABSTRACT
The heteropentomeric β-barrel assembly machine (BAM complex) is responsible for folding and inserting a diverse array of β-barrel outer membrane proteins (OMPs) into the outer membrane (OM) of Gram-negative bacteria. The BAM complex contains two essential proteins, the β-barrel OMP BamA and a lipoprotein BamD, whereas the auxiliary lipoproteins BamBCE are individually nonessential. Here, we identify and characterize three bamA mutations, the E-to-K change at position 470 (bamAE470K), the A-to-P change at position 496 (bamAA496P), and the A-to-S change at position 499 (bamAA499S), that suppress the otherwise lethal ΔbamD, ΔbamB ΔbamC ΔbamE, and ΔbamC ΔbamD ΔbamE mutations. The viability of cells lacking different combinations of BAM complex lipoproteins provides the opportunity to examine the role of the individual proteins in OMP assembly. Results show that, in wild-type cells, BamBCE share a redundant function; at least one of these lipoproteins must be present to allow BamD to coordinate productively with BamA. Besides BamA regulation, BamD shares an additional essential function that is redundant with a second function of BamB. Remarkably, bamAE470K suppresses both, allowing the construction of a BAM complex composed solely of BamAE470K that is able to assemble OMPs in the absence of BamBCDE. This work demonstrates that the BAM complex lipoproteins do not participate in the catalytic folding of OMP substrates but rather function to increase the efficiency of the assembly process by coordinating and regulating the assembly of diverse OMP substrates.
IMPORTANCE The folding and insertion of β-barrel outer membrane proteins (OMPs) are conserved processes in mitochondria, chloroplasts, and Gram-negative bacteria. In Gram-negative bacteria, OMPs are assembled into the outer membrane (OM) by the heteropentomeric β-barrel assembly machine (BAM complex). In this study, we probe the function of the individual BAM proteins and how they coordinate assembly of a diverse family of OMPs. Furthermore, we identify a gain-of-function bamA mutant capable of assembling OMPs independently of all four other BAM proteins. This work advances our understanding of OMP assembly and sheds light on how this process is distinct in Gram-negative bacteria.