Search results

Whilst a modest number of investigations have been undertaken concerning nanofluids (NFs), the exploration of fluid flow under exponentially stretching velocities using NFs remains comparatively uncharted territory. This work presents a distinctive contribution through the comprehensive examination of heat and mass transfer phenomena in the NF ND–Cu/H₂O under the influence of an exponentially stretching velocity. Moreover, the investigation delves into the intriguing interplay of gyrotactic microorganisms and convective boundary conditions within the system.

Similarity transformations have been used on PDEs to convert them into dimensionless ODEs. The solution is derived by using the homotopy analysis method (HAM). The pictorial notations have been prepared for sundry flow parameters. Furthermore, some engineering quantities are calculated in terms of the density of motile microbes, Nusselt and Sherwood numbers and skin friction, which are presented in tabular form.

The mixed convection effect associated with the combined effect of the buoyancy ratio, bioconvection Rayleigh constant and the resistivity due to the magnetization property gives rise to attenuating the velocity distribution significantly in the case of hybrid nanoliquid. The parameters involved in the profile of motile microorganisms attenuate the profile significantly.

The current simulations have uncovered fascinating discoveries about how metallic NFs behave near a stretched surface. These insights give us valuable information about the characteristics of the boundary layer close to the surface under exponential stretching.

The novelty of the current investigation is the analysis of NF ND–Cu/H₂O along with an exponentially stretching velocity in a system with gyrotactic microorganisms. The investigation of fluid flow at an exponentially stretching velocity using NFs is still relatively unexplored.

The modern day has seen an increase in the prevalence of the improvement of high-performance thermal systems for the enhancement of heat transmission. Numerous studies and research projects have been carried out to acquire an understanding of heat transport performance for their functional application to heat conveyance augmentation. The idea of this study is to inspect the entropy production in Darcy-Forchheimer Ree-Eyring nanofluid containing bioconvection flow toward a stretching surface is the topic of discussion in this paper. It is also important to take into account the influence of gravitational forces, double stratification, heat source–sink and thermal radiation. In light of the second rule of thermodynamics, a model of the generation of total entropy is presented.

Incorporating boundary layer assumptions allows one to derive the governing system of partial differential equations. The dimensional flow model is transformed into a non-dimensional representation by applying the appropriate transformations. To deal with dimensionless flow expressions, the built-in shooting method and the BVP4c code in the Matlab software are used. Graphical analysis is performed on the data to investigate the variation in velocity, temperature, concentration, motile microorganisms, Bejan number and entropy production concerning the involved parameters.

The authors have analytically assessed the impact of Darcy Forchheimer's flow of nanofluid due to a spinning disc with slip conditions and microorganisms. The modeled equations are reset into the non-dimensional form of ordinary differential equations. Which are further solved through the BVP4c approach. The results are presented in the form of tables and figures for velocity, mass, energy and motile microbe profiles. The key conclusions are: The rate of skin friction incessantly reduces with the variation of the Weissenberg number, porosity parameter and Forchheimer number. The rising values of the Prandtl number reduce the energy transmission rate while accelerating the mass transfer rate. Similarly, the effect of Nb (Brownian motion) enhances the energy and mass transfer rates. The rate of augments with the flourishing values of bioconvection Lewis and Peclet number. The factor of concentration of microorganisms is reported to have a diminishing effect on the profile. The velocity, energy and entropy generation enhance with the rising values of the Weissenberg number.

According to the findings of the study, a slip flow of Ree-Eyring nanofluid was observed in the presence of entropy production and heat sources/sinks. There are features when the implementations of Darcy–Forchheimer come into play. In addition to that, double stratification with chemical reaction characteristics is presented as a new feature. The flow was caused by the stretching sheet. It has been brought to people's attention that although there are some investigations accessible on the flow of Ree-Eyring nanofluid with double stratification, they are not presented. This research draws attention to a previously unexplored topic and demonstrates a successful attempt to construct a model with distinctive characteristics.

This paper aims to consider the heat transportation together with irreversibility analysis for the flow of couple stress hybrid nanofluid past over a stretching surface. The innovative characteristics of this paper include electro-magnetohydrodynamic (EMHD) term, viscous dissipation, Joule heating and heat absorption\omission. The hybrid nanofluid is prepared due to the suspension of the solid nanoparticles of the single wall and multi-wall carbon nanotubes (SWCNTs and MWCNTs) in the blood for the testing purpose of heat transfer and drug deliveries. The experimental value of the Prandtl number used for the blood is 21 from the available literature and very large as compared to the Prandtl number of the other base fluids. Appropriate transformations are incorporated to convert the modeled partial differential equations into the nonlinear ordinary differential equations. The homotopy analysis method (HAM) is used to obtain the solution. The explanation for velocity, energy and entropy are exposed under the influence of various parameters such as E, M, k, Q, S and Ec. The numerical values are calculated and summarized for dimensionless Cf and Nu.

In this investigation, heat transportation together with irreversibility analysis for the flow of couple stress hybrid nanofluid past over a stretching surface is considered. The innovative characteristics of this paper include EMHD term, viscous dissipation, Joule heating and heat absorption\omission. The hybrid nanofluid is prepared due to the suspension of the solid nanoparticles of the SWCNTs and MWCNTs in the blood for the testing purpose of heat transfer and drug deliveries. The experimental value of the Prandtl number used for the blood is 21 from the available literature and very large as compared to the Prandtl number of the other base fluids. Appropriate transformations are incorporated to convert the modeled partial differential equations into the nonlinear ordinary differential equations. The HAM is used to obtain the solution. The explanation for velocity, energy and entropy are exposed under the influence of various parameters such as E, M, k, Q, S and Ec. The numerical values are calculated and summarized for dimensionless Cf and Nu.

The explanation for velocity, energy and entropy are exposed and the flow against various influential factors is discussed graphically. The numerical values are calculated and summarized for dimensionless In addition, the current study is compared for various values of to that published literature and an impressive agreement in terms of finding is reported. It has also been noticed that the and factors retards the hybrid nanofluid flow, while the temperature of fluid becomes upsurges by the rise in these factors.

This is examined while evaluating the previously discussed publications that study on EMHD aspects of magnetized Casson type hybrid nanofluid via entropy generation research is innovative but also acknowledging that the couple stress model challenged bilaterally on stretching surface has not yet been studied. So, there is an ongoing attempt to bridge such a space.

In addition to quantitative analysis, the purpose of this paper is to measure the quality of articles published in foreign LIS journals by Pakistani authors based on their Impact Factor (IF) scores reported in the Journal Citation Reports (JCR) of 2010; also to discuss the significance and implications of this study for the current and potential authors in Pakistan and other developing countries.

The data for this study were collected from two sets of sources: first, online sources of Google Scholar, LISA, LISTA, an online 50‐year cumulative index of Pakistani LIS literature, and web pages of several authors; and second, printed indexes and bibliographies. The data collected were manually entered into MS Excel for tabulation and created nine tables, which formed the basis of discussion in the paper.

The contribution of Pakistani authors to foreign LIS journals is reasonable in number and below average in quality, according to the JCR IF scores. The authorship patterns show that there is a shift from single‐authorship to collaborative authorship. The contribution of academics is several times higher than that of library practitioners. Likewise the non‐resident Pakistani authors' share in the global LIS literature is much larger as compared to their counterparts living in Pakistan.

This is the first study that evaluates the quality of Pakistani LIS literature using the more popular journal ranking method, JCR IF. The results of this study are expected to have a positive impact on Pakistani authors as they start preparing articles according to the quality requirements of JCR‐ranked journals in the future.

This study aims to provide guidelines for exploring the research landscape in developing countries by gauging the prospects of growth, research impact and innovation. This study interrogates, analyses and visualizes the impact, nuances and evolution of stated research themes. For this purpose, this study presents an in-depth analysis of publications and citations indexed in Pakistani journals as a case study.

A bibliometric analysis of 46,034 publications published in Pakistan-based journals uncovers the research landscape of Scopus-indexed scientific literature – using various statistical and network-based approaches. Using VOSviewer and SPSS tools, the publication data has been analysed in relation to the open access status of papers, the number of authors, discipline, research theme and international co-authorship.

This study’s analyses reveal that while Pakistani journals are attracting international contributions from several countries, including India, Malaysia and Indonesia, no journal falls into the Scopus-defined top Quartile, i.e. the Q1 category. The analyses also highlight that only half (47%) of the publications received citations, whereas the other half remained uncited. Furthermore, open access publications received significantly higher citations than subscribed/traditional publications (print/online subject to toll access).

To the best of the authors’ knowledge, this is the first impact study of its kind that critically analyses the research landscape of Pakistani journals, especially in the context of the efforts of the higher education commission of Pakistan to promote research culture in the country. This study also provides analytical insights and policy guidelines for improving the quality of research published in Pakistani journals. This study can be replicated for other developing nations to provide guidelines and sustainable pathways for scientific growth in pursuit of uplifting nations by allocating resources for developing science and technology.

To wipe out the criticism of being a replica of conventional financial institution, Islamic financial institutions (IFIs) need to comply with Islamic principles not only on financial side but also while branding and marketing their products and services. This will bring the coherence between their overall market image and core business activities. This paper aims to discuss in detail the Islamic marketing traits relevant to the IFIs for positioning and offering their products.

This study follows the research design based on reviewing existing sources of Qura’an and Hadith, the secondary research literature on this novel topic and substantial intellectual discourse with the field experts.

It is criticized that IFIs lack the spirit of Islamic values for marketing and branding a commercial business entity. Therefore, this paper outline the differences between Islamic and conventional marketing. Also, it contributes to explain the traits of Islamic marketing mix relevant to the IFIs based on Islamic established principles.

This study gives valuable practical guidelines for the marketing policymakers of Islamic financial institutions. Islamic marketing mix; product, price, place and promotion, related strategies can be designed and branded keeping the true spirit of Islamic marketing values intact.

This study is practically important for Islamic financial intuitions to sustain their “Islamic” image by making sure of Islamic principles in their product development, pricing, promotions and distribution.

The socioeconomic system is the brand of Islamic economics and finance. IFIs being the stakeholders of this brand can contribute to the well-being of the society by enhancing their acceptability with the help of divine image and operations.

Literature on practical Islamic marketing approach in particular to the IFIs is very limited. This study gives comprehensive findings on all the major aspects of marketing based on Islamic values for Islamic financial institutions.

This paper aims to explore people’s beliefs towards Islamic advertising.

Being exploratory in nature, this paper applies qualitative method of research by adapting thought elicitation technique of data collection. This method rests in the projective techniques of data collection and is also known as “word association technique”. It allows free thinking of respondents that helps in generating rich data which is most required in qualitative studies.

Various beliefs regarding Islamic advertising were extracted and categorized into different dimensions. These dimensions pertained to Islamic advertising’s possibility, nature, characteristics, real-time decisions and potential outcomes.

Being an exploratory study, the data are collected from a small sample, hence raising generalization issues. Though, the same opens avenue for future research in that these dimensions should be subject to validation via large sample size.

This research will help in developing a scale to measure attitudes towards Islamic advertising, which the researchers can use to find justification for using Islamic advertising. Such application has great implications for businesses, as Islamic advertising concept stands contrary to the contemporary practices.

With a growing concern for business ethics, this research is an attempt to bring Islamic ethics into advertising practice. This will not only eradicate the ill-effects of contemporary advertising but also provide sound evidence for revising advertising policies.

It adds to the developing field of Islamic marketing, by being the first attempt of its kind in paving the way for Islamic advertising.

This research paper aims to explore the perceptions of Muslim consumers of the degree of compliance of Malaysian businesses to Islamic marketing practices and promotional strategies.

The perceptions of the Muslim consumers were examined by distributing a self‐administered survey questionnaire to a sample of 450 Muslim respondents residing in the major towns in Peninsular Malaysia. Items used in the questionnaire were derived from the basic guidelines provided in the Quran and the Sunnah on the conduct of business practices, specifically on the general marketing and promotional practices used.

Findings suggest that though there is an awareness of these regulations and practices, not many businesses in Malaysia are perceived to be complying with them both with respect to general Islamic marketing principles and with recommended Islamic promotional practices. There was also a significant difference in opinions expressed by Muslim consumers due to the influence of their religious educational background and the states in which they resided.

There is a need towards more research on how Islamic guidelines could be applied in all aspects of marketing activities. This could create more awareness among businesses about the issues and obligations that are relevant in marketing practices.

This research is a rare attempt on the part of researchers and scholars in Malaysia to relate the Islamic injunctions and guidelines on a specific discipline such as marketing. Although there have been many studies on Islamic finance and economics, the area of Islamic marketing remains clearly under researched.

The purpose of this study is twofold, first, the study aimed at investigating the impact of celebrities’ credibility on advertising effectiveness by examining the celebrity attributes that are likely to influence consumer attitude towards celebrity-endorsed TV advertising and their purchase behaviour. Second, the study seeks to identify the mediating role of religiosity on consumers’ attitudes towards celebrity-endorsed television advertising and buying behaviour.

The study is based on a survey questionnaire in a sample of 370 Sudanese customers on their attitude towards the celebrity endorsement of television advertising.

The study found that celebrities’ likeability and their attractiveness have the greatest impact on both consumers Attitude and their purchase behaviour. The study also confirms that religiosity partially mediate both the relationships between celebrities’ credibility and the attitude towards the advertisement and purchase behaviour and revealed that religiosity correlates negatively with celebrities’ credibility and attitude towards advertisement.

However, the study has some limitations, as it investigates the effectiveness of celebrities’ endorsement in TV commercials only. Future research could be extended to investigate the effectiveness of using celebrities advertising on other different media such as radio, printed and outdoors media. Further, the study uses a scale based on the Islamic practice dimensions, and using a more comprehensive scale to measure religiosity based on both belief and practices may be a further extension.

These results have important implications for advertising practitioners and business enterprises in Sudan, and other similar communities. They provide guidance in the sense that religiosity should be weighed in and given high importance when using celebrities in advertising campaigns and that the advertisement contents should be compliant with the Islamic law (Shariah).

Understanding how religious beliefs influence the attitude towards the advertising is of great importance to international advertisers to improve advertising effectiveness without offending their Muslim audience. The study enriches the literature on the religiosity and its influence on the consumer behaviour, particularly in the celebrity-endorsed advertisements.

To the best of the authors knowledge, this study is the first study of its kind in Sudan to explore the impact of celebrities’ endorsement on consumers attitude and buying behaviour and provide empirical evidence to verify the existence of a mediating role of religiosity on both the attitude and purchase behaviour in the Sudanese context. It provides an understanding of Sudanese attitudes and purchase decision, as Muslims, and thus provides practitioners with guidelines on how to design celebrity-endorsed TV advertisements to influence consumers’ attitude and buying behaviour.

This paper aims to study the factors that influence customer loyalty toward the internet service providers in Malaysia. The five factors used are corporate image, perceived quality, perceived value, price fairness and promotion. The mediating variable of this study is customer satisfaction, while customer loyalty is the study variable.

The primary data collection has been done by distributing survey questionnaires to 338 internet users in Malaysia. The data collected have been analyzed with SAS software.

The results showed that perceived quality has the strongest influence on customer satisfaction toward internet service providers in Malaysia. However, corporate image has no relationship with customer satisfaction toward internet service providers in Malaysia. Furthermore, customer satisfaction has a significant and positive relationship to customer loyalty toward the internet service providers in Malaysia.

European Customer Satisfaction Index has been adopted and combined with price fairness and promotion as a new research model that other researchers may look into it further. This research may also serve as a guide to internet service providers as they may learn about the underlying factors that affect the satisfaction and loyalty of customers and which factor has the strongest impact.