Search results

The purpose of this paper is to develop a novel electromagnetic-based acoustic energy harvester (EH) for the application of wireless autonomous sensors.

The developed acoustic EH comprises a Helmholtz resonator (HR), a suspension system that consists of a flexible membrane and a permanent magnet, a couple of coils and a coil holder. Furthermore, the HR, used in the harvester, is designed for a specific resonant frequency based on simulation carried out in COMSOL Multiphysics®.

The developed harvester is tested both in lab under harmonic sound pressure levels (SPLs) and in real environment under random SPLs. In lab, when exposed to 100 dB SPL, the harvester generated a peak power of 212 µW. Furthermore, in real environment in vicinity of electric generator, the harvester produced an output voltage of about 110 mV collectively from its both coils.

In this paper, a novel geometric configuration for electromagnetic-based acoustic EH is proposed. In the developed harvester, two coils are placed in it to achieve enhanced electrical output from it for the first time.

This paper aims to conceptualize the nexus between the participatory finance and the higher ethical objectives within the Islamic moral economy, also termed as Maqasid al Shari’ah.

Insights from the extant Islamic economics and finance literature are integrated through an interpretative systematic review using the principles from critical interpretative synthesis (CIS).

A coherent framework is synthesized comprising the typology of the Maqasid al Shari’ah, the axioms of participatory finance and their nexus which is formulated by theorizing the common thread of meaning through the axioms of participatory finance and Maqasid al Shari’ah at the interpretative level. This framework postulates that the participatory finance fits well in the ethos and the value system of Islam. Moreover, “social well-being” invariably provides the nexus between the Maqasid al Shari’ah and participatory finance.

This study contributes to the Islamic economics and finance literature by integrating the dissenting views from the divergent literature related to the basic philosophy of Shari’ah and participatory finance and provides grounds for policy implications, particularly, for designing the financial products. Moreover, it demonstrates an application of interpretative systematic review in Islamic banking and finance research.

In this paper, an institutional perspective is used to examine the different kinds of pressures on entrepreneurs manifest in a conflict environment. The purpose of this paper is to investigate how they respond to the conflict and establish legitimacy for their entrepreneurship in the challenging context of the north western areas of Pakistan.

In this study, a qualitative approach is taken based on semi-structured interviews from 16 different firms in the Swat valley.

The entrepreneurs undertake different strategies towards dealing with conflict and establishing legitimacy. These strategies are identified and examined in relation to the interactions between entrepreneurial behaviour and institutional pressures.

Qualitative research on a small sample inevitably presents a limitation on the generalisability of this work. Further research could employ quantitative methods to address this issue. One particular location is studied, so future research could be carried out in other countries or regions with similar problems.

The study may have value for policymakers who need to know more about how to support ongoing businesses in difficult regions.

Better understanding of the needs of small business may in time contribute to a better business climate in difficult regions.

A new dimension is added to institutional theory through its application in the very uncertain environment between all-out war and ongoing violence, identifying the possibility of weak agency for institutional change. Further, the study contributes to the growing body of literature on entrepreneurship in conflict environments.

The presence of heavy metals in milk causes many acute and chronic physiological dysfunctions in human organs. The present study aims to investigate the heavy metals in cow's and buffalo's milk of two major cities, Karachi and Gujranwala, Pakistan to estimate metal intake by humans from this source.

In total, 48 milk samples from 2 cities were drawn from animals' udder to avoid contamination. Each sample was digested with nitric acid at 105 ^oC (degree Celsius) on a pre-heated electric hot plate to investigate the metals by atomic absorption spectroscopy (flame type). Air-acetylene technique analyzed chromium, cadmium and lead, and the hydride method analyzed arsenic in the milk samples.

The results revealed the highest mean lead concentration (19.65 ± 43.86 ppb) in the milk samples, followed by chromium (2.10 ± 2.33 ppb) and arsenic (0.48 ± 0.73 ppb). Cadmium was not detected in any sample, assuming cadmium's occurrence was below the detection level. The concentrations of all the metals in the samples of the two cities do not differ statistically. Lead concentrations in the buffalo's milk were higher than in cow's milk (p < 0.05). However, the concentrations of arsenic and chromium between buffalo's and cow's milk do not differ statistically. The present study reveals a lower level of metals in the milk than those conducted elsewhere. The mean concentrations of all the metals met the World Health Organization's (WHO) safety guidelines (1993).

Although cadmium causes toxicity in the human body, cadmium could not be measured because cadmium's concentration was below the detection level, which is 1 ppb.

This study will help reduce the toxic metals in our environment, and the sources of heavy metals, particularly from the industrial sector could be identified. The feed and water consumed by the milking animals could be carefully used for feeding them.

This study will help reduce the diseases and malfunction of human organs and organ systems since these heavy metals cause toxicity and carcinogenicity in humans. Arsenic and chromium cause cancer while lead causes encephalopathy (a brain disease).

The study reports heavy metal concentrations in the two attributes of four independent variables of raw milk samples that were scarcely reported from Pakistan.

Reverse logistics (RL) is a type of supply chain management that moves goods from the end customer to the original manufacturer for reuse, remanufacturing and disposal purposes. Owing to growing environmental legislations and the development of new technologies in marketing, RL has attracted more significance among experts and academicians. Outsourcing RL practices to third-party reverse logistics provider (3PRLP) has been identified as one of the most important management strategies due to complexity of RL operations and the lack of available resource. Current sustainability trends have made 3PRLP assessment and selection process more complex. In order to select the 3PRLP, the existence of several aspects of sustainability motivates the experts to establish a new multi-criteria decision analysis (MCDA) approach.

With the growing complexity and high uncertainty of decision environments, the preference values of 3PRLPs are not always expressed with real numbers. As the generalized version of fuzzy set, intuitionistic fuzzy set and Fermatean fuzzy set, the theory of q-rung orthopair fuzzy set (q-ROFS) is used to permit decision experts (DEs) to their assessments in a larger space and to better cope with uncertain information. Given that the combined compromise solution (CoCoSo) is an innovative MCDA approach with higher degree of stability and reliability than several existing methods.

To exhibit the potentiality and applicability of the presented framework, a case study of S3PRLPs assessment is taken from q-rung orthopair fuzzy perspective. The assessment process consists of three sustainability aspects namely economic, environment and social dimensions related with a total of 14 criteria. Further, sensitivity and comparative analyses are made to display the solidity and strength of the presented approach. The results of this study approve that the presented methodology is more stable and efficient in comparison with other methods.

Thus, the objective of the study is to develop a hybrid decision-making methodology by combining CoCoSo method and discrimination measure with q-ROFS for selecting an appropriate sustainable 3PRLP (S3PRLP) candidate under uncertain environment. In the proposed method, a novel procedure is proposed to obtain the weights of DEs within q-ROFS context. To calculate the criteria weights, a new formula is presented based on discrimination measure, which provides more realistic weights. In this respect, a new discrimination measure is proposed for q-ROFSs.

Small and medium-sized enterprises (SMEs) are an important contributor to emerging countries’ economic growth. However, SMEs have been struggling to sustain their performance in a highly competitive environment. Thus, this study aims to re-examine the effect of SMEs’ entrepreneurial orientation (EO) on firms’ performance during the COVID-19. This study has also studied the moderating role of social media usage and the mediating role of marketing capabilities and social media usage.

This study used a structured questionnaire for data collection, where the unit of analysis was the manager or owner of SMEs. The data were analyzed using partial least square-structural equation modeling.

The findings show that an EO has a significant and positive effect on an SME’s performance, but the outcomes are conditional on the role of social media and marketing capabilities. The empirical results reveal that marketing capabilities significantly mediate the relationship between EO and SME performance. In addition, social media usage moderates the relationship between EO and SME performance and it also partially mediates the EO-performance nexus of SMEs. Finally, this study discovers that the EO-Performance nexus of SMEs is serially mediated by social media usage and marketing capabilities.

This study has important implications for SMEs that are seeking to gain a competitive advantage. For example, an SME should deploy market activities through social media channels. In situations such as a pandemic and uncertainty, this could be the most effective tool.

This study builds a theory-based mediation-moderation model to explain the link between EO and SME performance. In explaining mediation-moderation effects, the current study provides insight into EO-performance relationships. Moreover, the current model facilitates exploring whether serial mediation passes through social media usage and market capabilities. Therefore, with new findings, the study extends the literature on serial mediation in the EO-performance of SMEs. Additionally, this study extends the literature on the moderating role of social media on SMEs in Indonesia, which has not been investigated. Besides, the current study adds new insight into the EO-performance of SME in COVID-19 condition.

In the presence of informal sector in the country, designing an energy policy and the pursuit of higher economic growth become challenging for emerging economies. These economies are usually resource starved, and the presence of underground economy leads to faulty estimates of energy demand. The authors explore the energy–growth nexus in the presence of underground economy for Pakistan, an emerging economy host to large informal sector and facing recurring energy crises.

The authors evaluate the impact of underground economy on energy demand in the presence of explanatory variables, including official gross domestic product (GDP), foreign direct investment and financial development. The authors first assess the influence of official economy on the consumption of energy. The authors investigate how energy consumption is influenced solely by underground economy. Finally, the authors evaluate the impact of true GDP on the energy consumption. The authors employ combined cointegration method of Bayer and Hanck (2013) and then apply vector error correction model.

The results reveal that official GDP, underground economy and true GDP positively and significantly affect energy consumption in both short and long run. Similarly, financial development as well as foreign direct investment enhance energy consumption. The authors find unidirectional causality between energy consumption and official GDP variables (OGDP → EC), underground economy (UE → EC) and true GDP variables (TGDP → EC) in the long run. The authors observe bidirectional causality in the short run between energy consumption and official GDP (OGDP ↔ EC) and true GDP (TGDP ↔ EC).

To the best of the authors' knowledge, no study examines the causal relationship of energy consumption and underground economy. Overall, the findings assist policymakers to consider and implement different energy-related policies considering the significant role of underground economy for energy consumption in Pakistan.

This study used attribution and social exchange theories as bases to test a model comprising the most significant variables, namely, perception, attitudes and positive behaviour. The current research concentrated on the effects of three variables (i.e. organisational justice, support and identity) on task performance and organizational citizenship behaviour via job satisfaction, organisational commitment and work engagement. Additionally, this study aims to determine the external locus of control’s moderator role.

A questionnaire-based quantitative design was used as basis in collecting data from 1,125 industrial sector (i.e. electricity and oil industry) employees in southern Iraq.

Analysis of data reinforced the majority of the relationships in the research model. Results showed the mediator variables’ significance in providing explanation to the majority of the relationships and the external locus of control’s role in moderating such relationships. Research outcomes were used as bases in discussing several theoretical and practical implications, as well as presenting a few recommendations for studies in the future.

This research centres on determining the antecedents of positive behaviours via six circumstantial variables and one personal variable in a single model. Moreover, this study is applied in a developing country’s industrial sector with a moderately large sample size to yield evident and significant outcomes. Consequently, practitioners and academics are provided with a reference on managing and changing workplace behaviour.

Leadership has a decisive role in the success of all types of businesses and firms, including small- and medium-sized enterprises (SMEs), and the ethical behavior of leaders is a key component which brings a sense of respect, fulfillment, trustworthiness and acceptance among the employees, which later become visible in their job performance (JP). This study aims to check the immediate effect of ethical leadership (EL) on employee’s JP (EJP) and also explore the indirect mediating effect of corporate social responsibility (CSR) on this EL and EJP nexus.

Primary data was obtained from the employees of manufacturing SMEs of Northern Italy using a cross-sectional design from the end of 2019 to the start of 2020. This paper circulated 450 self-administered questionnaires using simple random sampling, and 202 (44.88%) valid questionnaires were returned. The PROCESS macro was performed using statistical package for social sciences to ensure whether or not EL affects EJP and is there any mediation effect of CSR present in this nexus.

The results indicate that EL has a strong positive connection with EJP and CSR. Interestingly, CSR positively influences EJP. Furthermore, the results also report the strong mediating effect of CSR in the nexus of EL and EJP.

This scholarly work seeks to contribute not only to the literature of EL and EJP but also enriches the understanding of this EL-EJP association by highlighting the indirect effect of mediating variable CSR in the SME sector.

Information literacy skills (ILSs) and information-seeking behavior (ISB) is a widespread topic that needs modern technologies to improve the technical skills of the students. The purpose of this study is to assess the usage of library resources for medical college students. To explore and understand the student’s level of satisfaction, learning and seeking behavior by efficient information retrieval systems.

The study is based on a quantitative research method and data was collected from the undergraduate students of medical colleges Islamabad Pakistan. The data were analyzed by Statistical Package for Social Science (SPSS) version 25 using Pearson correlation statistical test to identify the level of proficiency of correlation of variables and testing of the proposed hypothesis.

The finding of the study shows that the medical students can enhance their IT skills to seek the information in this technology era. The medical institutional administration can develop the education development policy, traditional health education policy, funds allocating policy, health information literacy and collaborate with library staff for enhancing the services and to meet the information need of medical students.

The conclusion of this study is very helpful to reduce the barriers between the students and the library staff. The findings of the study are also beneficial for the administration to improve and develop the strategies for enhancing the ILSs of medical students to achieve medical educational information in the age of technology. Therefore, all significant structures want to improve and to develop the environment of information seeking by medical students to achieve medical educational information.

Medical college library administrative management must be design useful a durable policy to come up with the technology development for digital literacy. The study reduces the barriers between the students and the library staff.

The study is based on quantitative research method to find out ISB of medical students.