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Depleting reserves of crude oils and their adverse environmental effects have shifted focus toward environment friendly and biobased lubricant base oils. Natural oils and fats act as good lubricants but they have low oxidation and thermal stability which makes them unsuitable for modern day uses. This paper aims to produce trimethylolpropane ester biolubricant from cottonseed oil and study the effects of its use in spark ignition (SI) engines.

In this work, cottonseed oil is converted to TMP lubricant by a two-step based catalyzed esterification. The lubricants thermophysical properties are then analyzed and a 20% blend with synthetic poly-alpha olefin is used in an spark ignition engine.

The produced lubricant has viscosity @100^oC of 4.91 cSt, a viscosity index of 230 and a flash point of 202^oC. When used as a 20% blend in a petrol engine, the rate of oil deterioration was reduced by 18%, however, the overall wear increased by 6.7%. However, this increase is offset by its improved environmental impacts.

In its current state, such a biolubricant can be used as an additive to most commercially available lubricants to improve oil deterioration characteristics and environmental impact. However, further work on improving biolubricant’s wear characteristics is needed for the complete replacement of mineral oil-based lubricants.

This study aims to provide insights into the drivers of student engagement in food waste reduction strategies in educational institutions. The proposed research model integrates social media celebrities' attractiveness, expertise and trustworthiness with the value belief norm (VBN) theory to explore their influence on students' behaviour towards food waste reduction.

The data were collected from 417 students enrolled in public and private universities in the Riyadh and Macca regions of Saudi Arabia to evaluate the proposed model. The partial least squares-structural equation modelling (PLS-SEM) was employed to analyse the responses.

The results showed that VBN theory's components, such as values (biospheric, altruistic and egoistic), beliefs (new ecological paradigm, awareness of consequences and aspirations of responsibility) and norms significantly and positively influence food waste reduction behavioural intentions. It was also discovered from the results that social media celebrities' attractiveness, expertise and trustworthiness influence food waste reduction behavioural intentions.

This study contributes significantly to the literature by identifying factors influencing student engagement in food waste reduction strategies in educational institutions where limited research exists. It fills this research gap by developing a novel theoretical framework integrating social media celebrities' attributes with the VBN theory to explain these factors.

The purpose of this research article is to explore the behavioural intention of consumers to use app-based shopping for green-tech products in the emerging economy of Bangladesh. The study investigates the indirect effects of perceived ease of use, usefulness, perceived delivery and perceived security on the behavioural intention to use app-based shopping for purchasing green-tech products by considering the mediating role of perceived trust.

A quantitative research approach was applied to collect data from the respondents who had previously used app-based shopping for green-tech products in Bangladesh. An online, self-administered survey questionnaire was used to collect data from 348 respondents. The survey data was analysed using SmartPLS-4 to measure the reliability and validity of the constructs. In addition, partial least squares structural equation modelling (PLS-SEM) was employed to test the research model and hypotheses.

The study's results reveal that perceived usefulness, ease of use, security and delivery positively and significantly influence perceived trust, leading to a higher behavioural intention to use app-based shopping for green-tech products. Additionally, perceived trust significantly mediates the relationship between the behavioural intention to use app-based shopping and perceived usefulness, perceived ease of use, perceived security and perceived delivery.

The study's findings have important implications for app-based shopping services to support customers interested in purchasing green-tech products in an emerging economy. The results also indicate that green-tech product companies must adopt new service delivery channels and ensure consumers' convenience and cost and time savings. The present research findings suggest that green-tech product companies need to ensure that they integrate digital technologies into their services for secure and timely delivery of products, improving customer convenience.

The study's findings can be insightful for app-based shopping service providers to foster their businesses by focussing on developing a positive trust perception in the consumer's mind, leading to a positive intention to use the app-based shopping services. The present study will enrich the current literature by investigating how consumers' perceived trust affects their behavioural intention to use app-based online shopping for purchasing green-tech products. It will also expand the existing knowledge on app-based shopping by exploring how perceived delivery impacts perceived trust, which subsequently affects customers' intentions to adopt the purchase of green-tech products.

This study aims to investigate consumer decision-making styles (CDMS) in the context of street food. In addition to the original CDMS constructs, two additional constructs, namely food safety risks and environmental risks, were included based on relevant literature. Furthermore, the study explores the moderating role of social media celebrities (SMCs) in bridging the intention-behaviour gap in street food consumption behaviour.

The data were collected through an online survey, with 300 participants providing useable responses. Partial least squares (PLS) analysis was employed to analyse the data.

The findings indicate that out of the eight identified CDMS, six styles, specifically recreational (hedonistic shopping consciousness), price consciousness, novelty-seeking, impulsiveness, confusion due to over-choice and brand loyalty, significantly influence consumers' intention to consume street foods. Additionally, the results support the moderating role of SMCs. This suggests that the presence and influence of SMCs play a significant role in shaping consumers' intention and behaviours towards street food consumption.

This study contributes significantly to the literature by adding two additional constructs, namely safety risks and environmental risks in CDMS. Moreover, this study fulfils the intention-behaviour gap in street food literature by exploring the moderation effect of SMCs.

The purpose of this paper is to extend the scant literature on the effect of abusive supervision on knowledge sharing by examining the roles of Islamic work ethic and learning goal orientation in moderating the effect.

This paper utilizes a cross-lagged survey research design to collect data from 735 employees working in the services and manufacturing sectors of Pakistan.

The data analysis revealed that abusive supervision has a damaging effect on knowledge sharing in the workplace. However, employee learning goal orientation and the Islamic work ethic help in mitigating this detrimental effect.

The main theoretical implication is to advance knowledge on the boundary conditions that help in mitigating the undesirable effect of abusive supervision on sharing of knowledge in organizational settings.

This paper provides practical insights into mitigating the damaging effects of abusive supervision, a prevalent issue in Asian societies, through the lenses of Islamic business ethics and learning goal orientation.

This is the first study that examines the boundary conditions placed by the Islamic work ethic and learning goal orientation around the relationship between abusive supervision and knowledge sharing in the context of Pakistan.

This study investigates the determinants influencing customers’ intentions of using the foodpanda mobile app during COVID-19 pandemic.

This study is based on review of the literature studies and 388 usable data collected from respondents having prior experiences in online food delivery (OFD) services in Dhaka city in Bangladesh. The subsequent data are analyzed through structural equation modeling using Smart PLS 3.3.3.

The findings show that perceived usefulness (PU), ease of use, convenience, attitude and fear of COVID-19 significantly impact intentions to use foodpanda mobile app (ITUFPMA) and attitude. Further, attitude partially mediates between PU, ease of use, convenience and ITUFPMA. Moreover, fear of COVID-19 moderates the strength of association between attitude and ITUFPMA.

The findings of the study may be useful to OFD service operators in formulating business strategies for improving customers’ foodpanda mobile app use intentions and coping with competitive business environment of sharing economy sector.

The study presents a unique case highlighting what are influencing customer intentions toward OFD services during COVID-19 context. The current study provides important insights for industry operators by integrating PU, ease of use, convenience, attitude and fear of COVID-19 in examining ITUFPMA during COVID-19 situation.

Computer technology in libraries has revolutionised the concept of rapid and accurate information services. In Pakistan, though, computer technology is new and is being successfully introduced in all types of libraries and information centres. This article reviews the literature on the use of computers in Pakistan’s libraries. The literature includes monographs, journal articles, reports, etc. published inside and outside Pakistan, discussing information technology, specific library applications, the activities of individual libraries and automation education. The need for library automation and the problems faced by Pakistani professionals in this respect are also discussed.

Drawing on stakeholder theory, this study examines the relationship between responsible leadership and its macro-, meso- and micro-level outcomes. Further, this study investigates the moderating role of authenticity on the relationship between responsible leadership and its multi-level effects, i.e. relational social capital, corporate social performance and community citizenship behaviour among employees.

The authors conducted four field studies using the quantitative methodology to test the hypotheses. In study 1 (N = 236), by adopting a multi-wave and multi-source research design, the authors examine the relationship between responsible leadership, authenticity and relational social capital. In study 2 (N = 203), by adopting a multi-wave research design, the authors examine the relationship between responsible leadership, authenticity and corporate social performance. In study 3 (N = 203), by adopting a multi-wave and multi-source research design, the authors examine the relationship between responsible leadership, authenticity and employees' community citizenship behaviour. In study 4 (N = 257), by adopting a multi-wave and multi-source research design, the authors capture the impact of responsible leadership on outcomes (social capital, corporate social performance and community citizenship behaviour) with a boundary condition of authenticity.

The authors find that responsible leadership enhances relational social capital, improves a firm's social performance and develops community citizenship behaviour among employees. Further, the study finds that authenticity positively moderates the relationship between responsible leadership and its multi-level outcomes.

First, it is a maiden study to investigate the multi-level outcomes of RL in a series of three empirical studies. Second, it contributes to RL literature by testing a unique moderating role of authenticity between RL and its multi-level outcomes of relational social capital, corporate social performance and employees' community citizenship behaviour. This study also provides empirical evidence for the multi-level implications of stakeholder theory.

This study aims to investigate the effect of healthy food advertising (HFA) in preventing obesity (measured using the healthy eating attitude and perceived self-regulatory success) through the meta-cognitive role of consumer wisdom (CW). The meta-cognitive role of CW to better promote healthy eating attitude and behavior is relevant and underexplored.

Data were collected from 310 young consumers through an online survey. Reliability and validity were established using confirmatory factor analysis, and hypotheses were analyzed through structural equation modeling using MPlus V8.3.

The results reveal that HFA has a positive influence on all dimensions of CW: responsibility, purpose, perspective, reasoning and sustainability. All dimensions but one augment a positive healthy eating attitude, but only responsibility and sustainability enhance consumers’ self-regulatory success. The findings show that HFA does not directly prevent obesity, but CW mediates the relationship between that advertising and obesity prevention. These findings show that CW establishes a mindful connection between HFA and obesity control.

This research extends the theory of CW in the context of healthful eating and contributes significantly to the advertising, hospitality and obesity literature.

This study also has implications for multiple stakeholders, including consumers, restaurant operators, hospitality managers, brand managers, the government and society in general.

To the best of the authors’ knowledge, this study marks the first attempt to investigate the role of CW in preventing obesity. It is also the first study to examine the relationships of HFA with CW and a healthful attitude toward eating.

More and more governmental organizations are switching to information systems to enhance their operations and reduce cost but the development of these systems involves a lot of challenges. This paper aims to find out the challenges that project managers have to face during the development of such systems and the practices they can adopt to address these challenges.

To identify the challenges, data have been gathered across six key project management areas. The six targeted key areas are project integration management, project scope management, project time management, project cost management, project human resource management and project communications management. The authors have coordinated with 11 managerial-level IT professionals using semi-structured interviews and have gone through their communication archives.

Findings prove that practices such as focusing on cost reduction, informal congregations, trainings and frequent communication between vendor and client help in addressing the challenges. Furthermore, learning from management experiences of the managers can assist managers in similar role to create a pattern of success while working with governmental projects.

The authors peek into the development life cycle of a public sector project named as prison information management system. The project has encountered numerous challenges and has been accomplished in significantly delayed time than designated.