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1 – 10 of 27Shivendra Singh Rathore and Chakradhara Rao Meesala
The purpose of this paper is to investigate the effect of the replacement of natural coarse aggregate (NCA) with different percentages of recycled coarse aggregate (RCA) on…
Abstract
Purpose
The purpose of this paper is to investigate the effect of the replacement of natural coarse aggregate (NCA) with different percentages of recycled coarse aggregate (RCA) on properties of low calcium fly ash (FA)-based geopolymer concrete (GPC) cured at oven temperature. Further, this paper aims to study the effect of partial replacement of FA by ground granulated blast slag (GGBS) in GPC made with both NCA and RCA cured under ambient temperature curing.
Design/methodology/approach
M25 grade of ordinary Portland cement (OPC) concrete was designed according to IS: 10262-2019 with 100% NCA as control concrete. Since no standard guidelines are available in the literature for GPC, the same mix proportion was adopted for the GPC by replacing the OPC with 100% FA and W/C ratio by alkalinity/binder ratio. All FA-based GPC mixes were prepared with 12 M of sodium hydroxide (NaOH) and an alkalinity ratio, i.e. sodium hydroxide to sodium silicate (NaOH:Na2SiO3) of 1:1.5, subjected to 90°C temperature for 48 h of curing. The NCA were replaced with 50% and 100% RCA in both OPC and GPC mixes. Further, FA was partially replaced with 15% GGBS in GPC made with the above percentages of NCA and RCA, and they were given ambient temperature curing with the same molarity of NaOH and alkalinity ratio.
Findings
The workability, compressive strength, split tensile strength, flexural strength, water absorption, density, volume of voids and rebound hammer value of all the mixes were studied. Further, the relationship between compressive strength and other mechanical properties of GPC mixes were established and compared with the well-established relationships available for conventional concrete. From the experimental results, it is found that the compressive strength of GPC under ambient curing condition at 28 days with 100% NCA, 50% RCA and 100% RCA were, respectively, 14.8%, 12.85% and 17.76% higher than those of OPC concrete. Further, it is found that 85% FA and 15% GGBS-based GPC with RCA under ambient curing shown superior performance than OPC concrete and FA-based GPC cured under oven curing.
Research limitations/implications
The scope of the present paper is limited to replace the FA by 15% GGBS. Further, only 50% and 100% RCA are used in place of natural aggregate. However, in future study, the replacement of FA by different amounts of GGBS (20%, 25%, 30% and 35%) may be tried to decide the optimum utilisation of GGBS so that the applications of GPC can be widely used in cast in situ applications, i.e. under ambient curing condition. Further, in the present study, the natural aggregate is replaced with only 50% and 100% RCA in GPC. However, further investigations may be carried out by considering different percentages between 50 and 100 with the optimum compositions of FA and GGBS to enhance the use of RCA in GPC applications. The present study is further limited to only the mechanical properties and a few other properties of GPC. For wider use of GPC under ambient curing conditions, the structural performance of GPC needs to be understood. Therefore, the structural performance of GPC subjected to different loadings under ambient curing with RCA to be investigated in future study.
Originality/value
The replacement percentage of natural aggregate by RCA may be further enhanced to 50% in GPC under ambient curing condition without compromising on the mechanical properties of concrete. This may be a good alternative for OPC and natural aggregate to reduce pollution and leads sustainability in the construction.
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Vaibhav Tripathi, Prajna Paromita Dey, Ramji Nagariya and Ajai Pratap Singh
Even after establishing their business successfully, many business owners get demotivated, and it leads to unwillingness to grow. This study aims to propose a comprehensive model…
Abstract
Purpose
Even after establishing their business successfully, many business owners get demotivated, and it leads to unwillingness to grow. This study aims to propose a comprehensive model that represents interrelationships among various personal factors affecting “unwillingness to grow.”
Design/methodology/approach
The personal factors for unwillingness to grow were identified by extant literature, and expert interviews were conducted to establish the contextual relationships among these factors. The interrelationships among the filtered variables have been done using interpretive structural modeling (ISM) and MICMAC analysis was done to determine the importance of each factor in influencing “unwillingness to grow.”
Findings
In total, 30 personal attributes were identified from previous literature, out of which 15 were selected for the final study. The result identifies 7 variables having a strong impact on “unwillingness to grow.” These attributes are “absence of strong network,” “lack of vision,” “lack of proactiveness,” “reluctance to involve external consultants,” “absence of/small founding team,” “lack of ambition” and “improper attitude.”
Originality/value
The research attempts to create a bricolage of all the important personal factors affecting “unwillingness to grow.” Previous researches have used few attributes, but with the help of ISM, a graphical modeling technique, it became possible to draw interrelationship between 15 attributes. Further, with the help of MICMAC, the importance of each attribute was determined.
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Manaf Al-Okaily, Ali Tarhini, Ahmad Albloush and Malek Alharafsheh
The purpose of this paper is to examine mediating role of individual performance between the association of organizational politics and organizational performance in Jordanian…
Abstract
Purpose
The purpose of this paper is to examine mediating role of individual performance between the association of organizational politics and organizational performance in Jordanian public sector.
Design/methodology/approach
The partial least squares–structural equation modeling was conducted to test the suggested hypotheses.
Findings
The findings revealed that organizational performance is significantly and negatively influenced by organizational politics and positively influenced by individual performance. In addition, the results also revealed that individual performance is significantly and negatively influenced by organizational politics. Finally, the results show that individual performance has mediated the association between organizational politics and organizational performance, and hence last hypothesis was accepted.
Originality/value
The current study provides several recommendations to the decision-makers in the Jordanian public sector, including enhancing transparency and publishing policies and regulations in a general and easily accessible manner.
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Engaged employees assure organizational competitiveness and sustainability. The purpose of this study is to explore the relationship between job resources and employee turnover…
Abstract
Purpose
Engaged employees assure organizational competitiveness and sustainability. The purpose of this study is to explore the relationship between job resources and employee turnover intentions, with employee engagement as a mediating variable.
Design/methodology/approach
Data were collected from 934 employees of eight wholly-owned pharmaceutical industries. The proposed model and hypotheses were evaluated using structural equation modeling. Construct reliability and validity was established through confirmatory factor analysis.
Findings
Data supported the hypothesized relationship. The results show that job autonomy and employee engagement were significantly associated. Supervisory support and employee engagement were significantly associated. However, performance feedback and employee engagement were nonsignificantly associated. Employee engagement had a significant influence on employee turnover intentions. The results further show that employee engagement mediates the association between job resources and employee turnover intentions.
Research limitations/implications
The generalizability of the findings will be constrained due to the research’s pharmaceutical industry focus and cross-sectional data.
Practical implications
The study’s findings will serve as valuable pointers for stakeholders and decision-makers in the pharmacuetical industry to develop a proactive and well-articulated employee engagement intervention to ensure organizational effectiveness, innovativeness and competitiveness.
Originality/value
By empirically demonstrating that employee engagement mediates the nexus of job resources and employee turnover intentions, the study adds to the corpus of literature.
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Ping Ping Gui, Gazi Mahabubul Alam and Aminuddin Bin Hassan
This comparative study aims to examine the role of Socio-Economic Status (SES) on the academic performance of university students who hold both the status of Residential College…
Abstract
Purpose
This comparative study aims to examine the role of Socio-Economic Status (SES) on the academic performance of university students who hold both the status of Residential College (RC) and non-RC. The study further investigates whether the RC is able to offset the effects of SES on students' learning performance to ensure education equity and inclusion in China.
Design/methodology/approach
Data are collected through a questionnaire given to RC and non-RC students enrolled in three public universities in China. A quasi-experimental design is implemented to investigate the potential correlation, if any, between SES, RC and academic performance.
Findings
The results reveal that SES influences academic performance of RC students. Furthermore, the findings strongly suggest that RCs negatively moderate the effect of SES on academic performance.
Research limitations/implications
This study examines RCs within a specific type of university in China, which may limit the generalizability of findings. Additionally, it uses a quasi-experimental method and relies solely on quantitative data, which may also introduce limitations.
Practical implications
Provided in this study is evidence that RCs can be an innovative way to bolster inclusive and equitable quality education for students from diverse backgrounds in China.
Originality/value
This study enriches the existing literature by exploring the relationships between RC, SES and academic performance in China. In addition, it provides significant references to whether RC can fulfill students' education equity and inclusion.
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The prevalence of independent contractors in the US workforce is growing. This research examines the social environment and career outcomes of labor and employment arbitrators, a…
Abstract
Purpose
The prevalence of independent contractors in the US workforce is growing. This research examines the social environment and career outcomes of labor and employment arbitrators, a unique profession of high-skilled and high-status independent contractors who play a significant role in facilitating organizational justice. Previous research has focused on the employment relationships that independent contractors have with hiring organizations and the characteristics of individuals who become independent contractors; however, little attention has been given to how relational factors influence the career outcomes of high-skilled independent contractors or how such influences differ by gender. Building upon theories of social networks and unequal network returns (UNR), our study investigates the informal social relationships among arbitrators, the association between interpersonal relationship patterns and arbitrators’ career success, and how these associations vary based on gender.
Design/methodology/approach
A social network survey is used to collect the social networks, attitudes and fee information of 407 labor and employment arbitrators working in North America. A multi-level regression analysis was used to examine the proposed relationships among social networks, gender and career outcomes of the arbitrators.
Findings
We discovered that occupying a central position within advice networks is positively associated with occupational satisfaction. On the other hand, having strong ties is associated with achieving high employment arbitration fees. Notably, we found that the advantages of strong ties for arbitration fees are comparatively weak for female arbitrators relative to their male counterparts.
Originality/value
This research examines the relationship between social networks and career outcomes for independent contractors in the unique context of arbitrators. It further highlights inequalities experienced by female arbitrators in a male-dominated profession where their social networks offer fewer rewards relative to their male counterparts.
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Daniel Werner Lima Souza de Almeida, Tabajara Pimenta Júnior, Luiz Eduardo Gaio and Fabiano Guasti Lima
This study aims to evaluate the presence of abnormal returns due to stock splits or reverse stock splits in the Brazilian capital market context.
Abstract
Purpose
This study aims to evaluate the presence of abnormal returns due to stock splits or reverse stock splits in the Brazilian capital market context.
Design/methodology/approach
The event study technique was used on data from 518 events that occurred in a 30-year period (1987–2016), comprising 167 stock splits and 351 reverse stock splits.
Findings
The results revealed the occurrence of abnormal returns around the time the shares began trading stock splits or reverse stock splits at a statistical significance level of 5%. The main conclusion is that stock split and reverse stock split operations represent opportunities for extraordinary gains and may serve as a reference for investment strategies in the Brazilian stock market.
Originality/value
This study innovates by including reverse stock splits, as the existing literature focuses on stock splits, and by testing two distinct “zero” dates that of the ordinary general meeting that approved the share alteration and the “ex” date of the alteration, when the shares were effectively traded, reverse split or split.
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Raavi Masta and Pavni Kaushiva
With the increasing global popularity of the gig economy encompassing freelancers, online platform workers, self-employed, on-call workers and other temporary contractual workers…
Abstract
Purpose
With the increasing global popularity of the gig economy encompassing freelancers, online platform workers, self-employed, on-call workers and other temporary contractual workers, this study aims to review research focusing on the gig economy to explore the nuances of working in various alternative work arrangements. We aim to enhance the understanding of existing literature and highlight underexplored areas for future research.
Design/methodology/approach
A systematic literature review of 258 studies based on gig economy and gig work was conducted. It follows systematic search criteria and SPAR-4-SLR protocols. The analysis uses different gig worker profiles given by Watson et al. (2021) to categorize studies, followed by thematic analysis to identify patterns in the literature.
Findings
Our analysis of studies on gig economy shows that the majority of existing literature is based on gig service providers. Within this literature subset, major areas of study are work conditions, financial conditions, emergence and role of collectives, the impact of algorithmic management and the impact of rise of the gig economy on entrepreneurship. There is little research focusing on gig goods providers, gig data providers, agency gig workers and traditional gig worker profiles. More focus is also needed on emerging markets and markets transitioning to the gig economy.
Originality/value
Differing from reviews that have attempted to define gig work and workers, we focus on literature on the lived experiences of gig workers. By reviewing studies on different gig worker profiles, we are able to highlight future research directions for pointed sample sets and comparative underexplored areas.
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Katrina E. Forbes-McKay, Pauline A.M. Bremner, Pamela Johnston and Carol Air
This study addresses gaps in the existing literature on students' understanding of Independent Learning (IL), whilst exploring the link between levels of IL, growth mindset…
Abstract
Purpose
This study addresses gaps in the existing literature on students' understanding of Independent Learning (IL), whilst exploring the link between levels of IL, growth mindset, motivated strategies for learning and academic performance.
Design/methodology/approach
Three hundred and eighty-six university students recruited via opportunistic sampling completed an online survey to measure: understanding and level of IL, Motivated Strategies for Learning (MSL) (Duncan and McKeachie, 2005) and growth mindset (Dweck, 2000). Interaction with the university Virtual Learning Environment (VLE) and academic grades were also measured. A correlational design was implemented, and a Spearman Rho was calculated to explore the relationship between level of IL, MSL and growth mindset. A between-subjects design using independent measures t-test was employed to determine the significance of any difference in level of IL and VLE engagement according to academic grade.
Findings
Whilst most students: considered themselves an IL and understood what IL was, the majority erroneously believed it meant learning alone or without help. Level of IL, however, was positively associated with motivational beliefs (self-efficacy and mindset), cognitive strategies (rehearsal, elaboration, organisation and critical thinking), and metacognitive strategies (time management and self-regulation). Further, those with grades A-C scored significantly higher than those with grades D and below on cognitive strategies (elaboration and organisation). Those attaining higher grades also interacted with the VLE significantly more frequently and regularly than those attaining lower grades.
Originality/value
This study adds to the existing literature by highlighting the positive relationship between level of IL, MSL, mindset and academic achievement. It also addresses the under-explored potential for VLE engagement in predicting grades amongst on-campus courses. Given that cognitive strategies and VLE engagement differentiate the high and low achievers, interventions to develop such skills may enhance academic achievement.
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Sandra Carrasco and Irene Perez Lopez
This study explores the opportunities for a gender-inclusive architecture, engineering and construction (AEC) industry, focussing on the gap between architectural education and…
Abstract
Purpose
This study explores the opportunities for a gender-inclusive architecture, engineering and construction (AEC) industry, focussing on the gap between architectural education and practice. This study focusses on three research questions: (1) What factors influence women architects' career retention and advancement in the AEC industry? How can practice outcomes be linked with educational approaches for gender inclusion in the AEC industry? (3) What critical factors can enable structural changes in architecture education, including AEC-related subjects and practice/career pathways towards gender equity?
Design/methodology/approach
This paper is based on a systematic literature review (SLR). The established timeframe for selecting papers in this study considered the last 20 years, as various seminal studies in feminism and gender inclusion in architecture emerged in the early 2000s through the definition of keywords used in two prestigious databases. The academic articles selected were filtered through a process of inclusion and exclusion, following criteria for suitability and relevance using a Preferred Reporting Items for Systematic Reviews (PRISMA) diagram.
Findings
This study revealed key trends in the literature review consistent with the research questions, including (1) the disproportionate struggles women face at individual, interpersonal and organisational levels and the gender-based bias from entry and progression in the AEC industry that also requires multi-level interventions; (2) traditional architecture education affects female students and educators who find networking, social capital and leadership opportunities to challenge gender-based stereotypes and promote workplace equity, and finally, (3) observe enablers for fostering equity in architecture and education, which should not be limited to policy-driven interventions but structural transformations through transparency, mentorship, leadership, awareness raising and empowerment of women and men, promoting inclusivity and gender equity in the AEC industry.
Research limitations/implications
This study considers a global understanding of gender equity in the AEC industry, regional and country-specific analysis needs to be considered in future studies. The study's focus is on women’s inclusion, acknowledging the limitations of conventional binary gender concepts; future studies need to include the experiences of LGBTI + communities and other underrepresented groups. The literature review considers only academic articles; future research should also consider industry reports, government initiatives and organisational documents for a broader understanding of diversity efforts in business.
Originality/value
This paper observes the issues for gender-inclusive architecture within the context of a male-dominant AEC industry through linking architectural education and practice. Studies rarely focus on this link and address workplace issues. This study highlights this link and extends the discussion through the critical literature review, providing a new ground for geographic-specific or intersectional studies.
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