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The purpose of this paper is to analyze the historical gas allocation pattern for seeking appropriate arrangement and utilization of potentially insufficient natural gas supply available in Pakistan up to 2030.

This study presents Markov chain-based modeling of historical gas allocation data followed by its validation through error evaluation. Structural prediction using classical Chapman–Kolmogorov method and varying-order polynomial regression in the historical transition matrices are presented.

Markov chain model reproduces the terminal state vector with 99.8 per cent accuracy, thus demonstrating its validity for capturing the history. Lower order polynomial regression results in better structural prediction compared with higher order ones in terms of closeness with Markov approach-based prediction.

The data belongs to a certain geographic region with specific gas demand and supply profile. The proposition may be tested further by researchers to check the validity for other comparable structural predictions/analyses.

This study can facilitate policy-making in the field of natural gas allocation and management in Pakistan specifically and other comparable countries generally.

Two major literature gaps filled through this study are: first, Markov chain model becomes stationary when projected using Chapman–Kolmogorov relation in terms of a fixed, average transition matrix resulting in an equilibrium state after a finite number of future steps. Second, most of the previous studies analyze various gas consumption sectors individually, thus lacking integrated gas allocation policy.

The novel mechanical, chemical and thermodynamics characteristics of both single- and multi-wall carbon nanotubes (CNTs) make them a subject of much attention for the scientists and engineers from all domains. Fluid flows subject to CNTs are significant in biomedical engineering, energy storage systems, domestic and industrial cooling, automobile industries and solar energy collectors, etc. Keeping such effectiveness of CNTs in mind, this paper aims to examine peristaltic flow subject to CNTs in an asymmetric tapered channel. Both single and multiple walls CNTs are considered. The viscosity of nanomaterial depends on nanoparticles volume fraction and temperature. Total entropy rate through second law of thermodynamics is calculated. Heat source/sink and nonlinear heat flux are accounted.

The complicated flow expressions are simplified through lubrication approach. The velocity, temperature and entropy expressions are numerically solved by the built-in-shooting method.

The solutions for entropy generation, temperature and velocity are plotted, and the influences of pertinent variables are examined. The authors noticed that entropy generation is an increasing function of the Brinkman number.

The originality of this work is to communicate peristaltic CNTs-based nanomaterial peristaltic flow of viscous fluid in an asymmetric channel. No such consideration is yet published in the literature.

The purpose of this paper is to analyze the Sutterby fluid flow by a rotating disk with homogeneous-heterogeneous reactions. Inspection of heat transfer is through Cattaneo–Christov model. Stratification effect is also considered.

Nonlinear equations are solved by the homotopy technique.

Sutterby fluid flow by rotating disk is not considered yet. Here the authors intend to analyze it with Cattaneo–Christov heat flux and homogeneous-heterogeneous reactions. Thermal stratification is also taken into consideration.

No such work is yet done in the literature.

Outstanding features such as superior electrical conductivity and thermal conductivity of alloy nanoparticles with working fluids make them ideal materials to be used as coolants in microelectromechanical systems (MEMSs). This paper aims to investigate the effects of different alloy nanoparticles such as AA7075 and Ti6Al4V on microchannel flow of magneto-nanoliquids with partial slip and convective boundary conditions. Flow features are explored with the effects of magnetism and nanoparticle shape. Heat transport of fluid includes radiative heat, internal heat source/sink, viscous and Joule heating phenomena.

Suitable dimensionless variables are used to reduce dimensional governing equations into dimensionless ordinary differential equations. The relevant dimensionless ordinary differential systems are computed numerically by using Runge–Kutta–Fehlberg-based shooting approach. Pertinent results of velocity, temperature, entropy number and Bejan number for assorted values of physical parameters are comprehensively discussed. Also, a closed-form solution is obtained for momentum equation for a particular case. Analytical results agree perfectly with numerical results.

It is established that the entropy production can be improved with radiative heat, Joule heating, convective heating and viscous dissipation aspects. The entropy production is higher in the case of Ti6Al4V-H₂O nanofluid than AA7075-H₂O. Further, the inequality Ns(ξ)_Sphere > Ns(ξ)_Hexahedran > Ns(ξ)_Tetrahydran > Ns(ξ)_Column > Ns(ξ)_Lamina holds true.

Effects of aluminium and titanium alloy nanoparticles in microchannel flows by using viscous dissipation and Joule heating are investigated for the first time. Flow features are explored with the effects of magnetism and nanoparticle shape. The results for different alloy nanoparticles such as AA7075 and Ti6Al4V have been compared.

The purpose of this study is, mixed convection on magnetohydrodynamic (MHD) flow of Eyring–Powell nanofluid over a stretching cylindrical surface in the presence of thermal radiation, chemical reaction, heat generation and Joule heating effect is investigated and analyzed. The Brownian motion and thermophoresis phenomenon are used to model nanoparticles (Buongiorno’s model).

The numerical method is applied to solve the governing equations. Obtained results from the effects of different parameters changes on velocity, temperature and concentration profiles are reported as diagrams.

As a result, velocity profile has been reduced by increasing the Hartman number (magnetic field parameter) because of the existence of Lorentz force and increasing Eyring–Powell fluid parameter. In addition, the nanoparticle concentration profile has been reduced because of increase in chemical reaction parameter. At the end, the effects of different parameters on skin friction coefficient and local Nusselt number are investigated.

Eyring–Powell nanofluid and MHD have significant influence on flow profile.

This study aims to analyze chief executive officer (CEO) duality in corporate governance by using Scopus data. It explores CEO duality research trends across diverse corporate governance contexts and disciplines, shaping the future research agenda, and proposing recommendations for further investigations in this area.

This analysis is conducted through VOSviewer software and Biblioshiny by extracting the bibliometric network from the output files of the Scopus bibliographic database.

Research on CEO duality centers on keywords such as corporate governance, agency theory, board of directors, board size and firm performance. Word tree maps uncover various research areas and gaps. Top authors are Elsyed K. & Rashid K, with the University of Utara Malaysia as the leading organization. Main disciplines are “Business Management and Accounting” followed by “Economics.” “Corporate Governance: An International Review” tops the journals with 1,120 citations. Quantitative methods using secondary data dominate (94%), mostly from nonfinancial industries (96%). Theoretical lenses include agency theory, stewardship theory, stakeholder theory, resource dependence theory and institutional theory. Firm performance is the most researched aspect (38% of studies) concerning CEO duality.

Bibliometric and systematic analysis offer researchers a general overview and in-depth insights into current CEO duality research trends, influential articles and keywords in corporate governance. This study’s findings benefit research institutions, professional bibliometric users and funding agencies alike.

By visualizing bibliometric networks and conducting systematic analysis of top-cited articles, this study not only advances the academic understanding of CEO duality in corporate governance but also provides actionable recommendations for researchers, practitioners and policymakers to enhance governance practices and contribute to the field’s evolving body of knowledge.

An increment in energy efficiency by employing nanoparticles is a hot topic of research in present era due to its abundant implications in modern engineering and technological processes. Therefore, the current research analysis reported the viscoelastic nanofluid flow over porous oscillatory moving sheet in the presence of microorganisms. A rate-type fluid namely Maxwell fluid is employed with the addition of nanoparticles. The paper aims to discuss this issue.

First, acceptable dimensionless variables are defined to convert the system of dimensional form into the system of dimensionless forms. Later on, the self-similar solution of the boundary value problem is computed by using the homotopy analysis method. The obtained results of velocity, temperature, mass concentration and motile microorganism density profiles are interpreted through physical background.

The presence of both thermophoresis and Brownian motion parameters also improve the thermophysical features of non-Newtonian nanoparticles. It is also pointed out that the presence of porous medium and magnetic force enhances the nanoparticles concentration. Moreover, a weaker distribution of gyrotactic microorganism has been depicted with Peclet number and bioconvection Lewis parameter.

No such article exists in the literature yet.

Although the research stream in the area of career plateau acknowledges its ramifications, yet investigation on how this phenomenon can be reduced is sparse. This study aims to address this gap by illuminating the role of proactive personality (PP) as a factor of minimizing plateau via playful work design (PWD), career adaptability (CA) and perceived work-life balance (PWLB).

A cross-sectional study design was applied and structural equation modelling was used to assess the hypothesized relationships among PP, CA, PWD, perceived work design and career plateau. A total of 338 employees from public and private universities were sampled from February 2020 to July 2020.

The results highlighted that CA mediated the relationship between PP and PWLB, as well as, PWD mediated the association between PP and PWLB. Further, the authors got support for both serial mediation paths i.e. PP, CA, PWLB and career plateau and PP, PWD, PWLB and career plateau.

The findings of this study provide much needed ways to overcome career plateau in the academic sector. Moreover, the use of multiple serial paths has enhanced the underlying factors of PP and career plateau nexus.

This study aims to examine the Financial Action Task Force’s recommendations on virtual currencies (VCs) and how Pakistan has responded to them.

Qualitative document and jurisprudence analysis techniques were used to achieve the study’s goal.

According to this study, VCs are modern FinTech that no jurisdiction can ignore. However, Pakistan has not adopted regulations to govern VCs but comprehensively prohibits their use. It is primarily due to the apathy of various regimes and regulators. Furthermore, the geographical location, undocumented economy and rampant corruption could facilitate the abuse of VCs for money laundering.

This study has provided a significant overview for developing regulations for VCs in Pakistan and other developing jurisdictions with the same characteristics.

The objective of this chapter is twofold. It first explores the complementarities of Islamic investment with Socially Responsible Investment. Secondly, it examines the financial price, for investors, of being both shariah-compliant and socially responsible.

Using a value-weighted approach, we experiment the construction of a set of sharia-compliant stock portfolios with different Environmental, Social, and Governance (ESG) performance. We use the KLD ratings of 238 companies listed in U.S. stock market from 2007 to 2011. We measure and compare their performance using the model developed by Fama and French (1993) and extended by Carhart (1997).

The results indicate no adverse effect on returns due to the application of a double screening, Islamic and SRI, and show a substantially higher performance for positive governance screen during 2008–2011 periods. This outperformance cannot be explained by differences in investment style. Though, we observe significant outperformance for some ‘irresponsible’ portfolios involved in community and human rights controversies.

The study only focuses on U.S. market. Future works should extend the experimentation to other markets.

This study provides a venue for Islamic funds managers to consider SRI screening as fully in line with shariah-compliance requirements, while preserving the performance of their portfolios.

Potentially, the reconciliation of Islamic investment with positive SRI practices may foster the implementation of CSR policies by firms’ manager willing to attract Islamic investors.

With reference to the many studies emphasising the compatibility between CSR criteria and Islamic principles, this experimental study is the first to investigate the integration of a positive screening process designed to select companies based on their ESG performance in addition to a traditional shariah-compliant screening.