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The purpose of this paper is to check the feasibility of using biomaterial such as of Phragmites-Australis (PA) in cement paste to achieve sustainable building materials.

In this study, cement pastes were prepared by adding locally produced PA fibers in four different volumes: 0%, 0.5%, 1% and 2% for a duration of 180 days. Bottles and prisms were subjected to chemical shrinkage (CS), drying shrinkage (DS), autogenous shrinkage (AS) and expansion tests. Besides, prism specimens were tested for flexural strength and compressive strength. Furthermore, a mathematical model was proposed to determine the variation length change as function of time.

The experimental findings showed that the mechanical properties of cement paste were significantly improved by the addition of 1% PA fiber compared to other PA mixes. The effect of increasing the % of PA fibers reduces the CS, AS, DS and expansion of cement paste. For example, the addition of 2% PA fibers reduces the CS, expansion, AS and DS at 180 days by 36%, 20%, 13% and 10%, respectively compared to the control mix. The proposed nonlinear model fit to the experimental data is appropriate with R2 values above 0.92. There seems to be a strong positive linear correlation between CS and AS/DS with R2 above 0.95. However, there exists a negative linear correlation between CS and expansion.

The PA used in this study was obtained from one specific location. This can exhibit a limitation as soil type may affect PA properties. Also, one method was used to treat the PA fibers.

The utilization of PA fibers in paste may well reduce the formation of cracks and limit its propagation, thus using a biomaterial such as PA in cementitious systems can be an environmentally friendly option as it will make good use of the waste generated and enhance local employment, thereby contributing toward sustainable development.

To the authors best knowledge, there is hardly any research on the effect of PA on the volume stability of cement paste. Therefore, the research outputs are considered to be original.

This paper aims to investigate the bond strength of metakaolin-based geopolymer mortar with cement mortar.

The mortar-mortar bond strength is assessed by slant shear and split tensile tests; pure shear strength is evaluated by Mohr’s criterion for result validation. Metakaolin-based geopolymer mortar is cast over the cured cement mortar specimen with two levels of surface roughness: smooth or grooved interface. The influence of the alkaline solution to metakaolin ratio on geopolymer bond strength is studied. Compressive strength, ultrasonic pulse velocity, permeability and flow table tests are also performed.

The paper’s findings are highlighted as follows: (1) strong mortar-mortar bond properties achieved for geopolymer mortar in all tests and conditions and validated by Mohr’s criterion and pure shear, (2) a lower alkaline solution to metakaolin ratio achieves higher bond strength to Portland cement mortar and (3) geopolymer mortar has higher compressive strength and ultrasonic pulse velocity than cement mortar at all curing ages; additionally, it is more flowable and less permeable.

The full replacement of Portland cement with metakaolin, a more sustainable cementitious material, will contribute to the decarbonization of the construction industry.

Limited research has been carried out on the bond strength of metakaolin-based geopolymer mortar to Portland cement mortar. Also, computing the pure shear using Mohr’s circle criterion of metakaolin-based geopolymer to validate the results can be considered original.

This study aims to provide a bibliometric analysis of 1,104 journal articles to explore the multifaceted research field of Islamic finance and banking, explicitly emphasising the impact of the COVID-19 pandemic.

Insights into the evolving trends and dynamics within the academic discourse are presented.

The research highlights different patterns and collaborative networks through co-authorship, co-occurrence and thematic map analyses. Prior to the pandemic, research focused primarily on customer satisfaction and compliance with Shariah principles. However, the pandemic heralded an increased discourse on sustainability, fintech and the financial crisis.

This review describes the prevailing academic terrain and identifies potential avenues for future research, particularly those that examine the socio-economic impact of the pandemic within the context of Islamic finance and banking.

Prominent author such as M. Kabir Hassan, leading institution such as the International Islamic University Malaysia and esteemed journal such as the International Journal of Islamic and Middle Eastern Finance and Management have been instrumental in shaping academic discussions and creating synergies in research. Moreover, Malaysia’s strong commitment to spatial research, evidenced by its robust global collaborations, underscores its pioneering role in the academic world of Islamic finance and banking.

The purpose of this paper was to examine the nexus between conditional exchange rate volatility and economic growth in BRICS countries. Further, the dynamic causation between economic growth and exchange rate volatility is also examined.

We employed three techniques, namely, dynamic panel models, static panel models and Dumitrescu and Hurlin (DH) panel causality test to examine the economic growth–conditional exchange rate volatility nexus in BRICS countries.

The overall results showed that conditional exchange rate volatility has a negative and significant effect on economic growth. Interestingly, the results showed that whenever the exchange rate volatility exceeds the 0–1.54 range, the economic growth of BRICS is reduced, on average, by 5%. Further, the results of the causality test reconciled with that of ARDL wherein unidirectional causality from exchange rate volatility, exports, labour force and gross capital formation to economic growth was found.

The urgent recommendation is to develop and align fiscal, monetary, trade and exchange rate policies, either through creating a common currency region or through coordinated measures to offset volatility and trade risks in the long run. Further, to offset the impact of excessive exchange rate changes, BRICS economies can set up currency hedging systems, implement temporary capital controls during periods of extreme volatility or create currency swap agreements with other nations or regions. Last, but not least, investment and labour policies that are coherent and well-coordinated can support market stabilisation, promote investment and increase worker productivity and job prospects.

Researchers hold contrasting views regarding the effect of exchange rate volatility on economic growth. Some researchers claim that exchange rate volatility reduces growth, and several shreds of empirical evidence claim that lower exchange rate volatility is linked with an increase in economic growth, at least in the short run. However, the challenge lies in establishing the optimal range beyond which exchange rate volatility becomes detrimental to economic growth. The present study contributes to this aspect by seeking to identify the optimal spectrum beyond which excessive shifts in exchange rate volatility negatively affect economic growth, or endeavors to define the acceptable spectrum within which these fluctuations actually boost growth. To the best of our knowledge, this study is the first to analyse the given research area. The present study used a dummy variable technique to capture the impact of permissible exchange rate band on the economic growth.

The energy sector is one of the most important sectors with an impact on the environment, and therefore, sustainable performance in this sector is considered a sensitive issue for sustainability. It is, therefore, necessary to know how to address stakeholders’ interest in sustainability through governance mechanisms. The purpose of this study is to look into the role of corporate governance (CG) on sustainable performance disclosure (SPD) in the energy sector.

This study uses panel data covering the period 2019–2023 among 12 companies in the energy sector in Jordan. Fixed-effect regression models were estimated for board size, board independence, chief executive officer (CEO) duality, board diligence, board gender diversity, sustainability committee existence and sustainability disclosure. The data analysis tool of choice was a multiple regression approach because it was deemed appropriate. The disclosure index was created using global reporting initiative standards and provides the number and quality of disclosures on key sustainability indicators.

The study found a significant and positive relationship between board size, percentage of independent directors, board audit, board gender diversity, existence of sustainability committee and level of SPD. On the other hand, the study establishes that CEO duality has an inverse relationship with SPD.

The findings of this study have significant implications for managers and corporate decision-makers in the energy sector. The findings affirm that the improved design of CG motivations and realizations conducive to robust measures of SPD necessitates effective CG.

The value of this applied study stems from the importance of SPD for various categories of stakeholders, and conducting such an applied study is crucial to improving the existing realization of the factors that can have a significant impact on the level of SPD in Jordanian energy sector companies. The results of this paper may be of procedural value to regulatory authorities and decision-makers.

This study aims to investigate the connections between the adoption of technology, user experience (UX), financial transparency and accountability, specifically focusing on the moderating influence of cultural sensitivity in the Jordanian context.

This study gathered data from 272 participants who are working in the operational Islamic banks in Jordan. Partial least squares structural equation modeling (PLS-SEM) is used for the hypotheses testing.

The results indicate that cultural sensitivity plays a significant role in shaping the UX, consequently influencing perceptions of financial transparency and accountability in e-Islamic finance within the metaverse. This study underscores the intricate interplay between technological advancements, adherence to Sharia principles and diverse cultural expectations, forming the crux of the research.

This research brings a novel perspective by examining the complex connections among technology adoption, UX, financial transparency and accountability, specifically within the distinctive context of Jordan. This research study innovates by checking out how social sensitivity moderates these partnerships, specifically in the context of e-Islamic finance in the metaverse. It adds value to the academic area by shedding light on the intricate interaction between technological development, adherence to Sharia concepts and differing cultural expectations. Ultimately, this adds to a much deeper understanding of the multifaceted nature of this domain.

This work aims to investigate the feasibility of recycling waste plastic (polyethylene terephthalate) as a coarse aggregate for producing blended cement concrete modified with fly ash and pond ash.

The low, medium and high controlled strength blended cement concrete modified with varied proportions of fly and pond ashes were produced. Manufactured sand and recycled plastic coarse aggregate (RPCA) replaced normal fine and coarse aggregates. Concrete samples were tested for workability, mechanical and durability characteristics. Microstructural analysis was performed on cement concrete blended with fly and pond ashes and compared to conventional concrete samples.

All concrete mixes showed better flowability with values greater than 200 mm. Besides, the maximum flow time was approximately 8 s. The wet density of blended cement concrete-RPCA-based concretes was approximately 30% lower than that of conventional concrete. The compressive strengths of the controlled strength mix at 7 and 28 days were within the specified ranges. While the conventional concrete had slightly higher permeability, the blended cement concrete-RPCA-based concretes had better thermal resistivity and lower thermal conductivity. The scanning electron microscopy analysis revealed the densification of the microstructure due to the filler effects of fly and pond ashes.

This study establishes the prospects of substituting RPCA with normal coarse aggregate in the production of controlled low-strength blended cement concrete, offering benefits of structural fill concrete, lower permeability and thermal conductivity, higher thermal resistivity and reduced density and shrinkage.

The study aims to identify, summarize and synthesize the theories used in corporate financial reporting (CFR) and propose a conceptual framework based on those theories.

The study applied the systematic literature review approach to achieve the study objectives. So, the researchers systematically collected the relevant documents from the Scopus database with the help of an advanced search string containing keywords to the CFR theories. Preferred reporting items for systematic reviews and meta-analyses technique was used for the relevant document selection process. Finally, 67 documents were extracted and analyzed spanning from the year of 2017 to 2023.

The major findings of this study indicate a predominance of legitimacy, agency and stakeholder theories in CFR studies. Whereas, this study reveals that neo-institutional, signaling, resource dependency, political economics and impression management theories have been less focused on by scholars in the CFR studies. Those theories need to be reemphasized in this field in future research.

The study’s contributions are significant for academics, policymakers and different parties, as it enhance the understanding of CFR theoretical frameworks and suggest directions for future research to broaden the theoretical landscape. The study maps the motivations of applying a certain theory which will help the researchers to select a specific theory for the underlying context of CFR.

The purpose of this study is to forecast the mechanical properties of ternary blended concrete (TBC) modified with oyster shell powder (OSP) and shea nutshell ash (SNA) using deep neural network (DNN) models.

DNN models with three hidden layers, each layer containing 5–30 nodes, were used to predict the target variables (compressive strength [CS], flexural strength [FS] and split tensile strength [STS]) for the eight input variables of concrete classes 25 and 30 MPa. The concrete samples were cured for 3–120 days. Levenberg−Marquardt's backpropagation learning technique trained the networks, and the model's precision was confirmed using the experimental data set.

The DNN model with a 25-node structure yielded a strong relation for training, validating and testing the input and output variables with the lowest mean squared error (MSE) and the highest correlation coefficient (R) values of 0.0099 and 99.91% for CS and 0.010 and 98.42% for FS compared to other architectures. However, the DNN model with a 20-node architecture yielded a strong correlation for STS, with the lowest MSE and the highest R values of 0.013 and 97.26%. Strong relationships were found between the developed models and raw experimental data sets, with R² values of 99.58%, 97.85% and 97.58% for CS, FS and STS, respectively.

To the best of the authors’ knowledge, this novel research establishes the prospects of replacing SNA and OSP with Portland limestone cement (PLC) to produce TBC. In addition, predicting the CS, FS and STS of TBC modified with OSP and SNA using DNN models is original, optimizing the time, cost and quality of concrete.

This paper aims to examine the impact of increased board independence on firms’ operating performance in light of corporate governance (CG) reform in Bangladesh, an emerging economy.

The study used a panel data set on 183 non-financial companies listed on the Dhaka Stock Exchange, Bangladesh, from 2007 to 2017. The system generalized method of moments estimation technique was used to control possible endogeneity issues in the governance–performance nexus.

The policy evaluation results using difference-in-difference estimation confirm that the regulatory reform encompassing doubling up the proportion of independent directors improves firm performance. It reveals that the negative significance of board independence in the pre-reform stage fades away after the code modification phase. Furthermore, the study reports that the regulatory change demonstrates noteworthy differences in the effects of internal governance parameters on performance for small- and large-sized firms.

The findings suggest that although the policy shift establishes the board’s resource provisioning role, the full-fledged monitoring contribution that improves firm performance has yet to be demonstrated.

This study extends scant literature on the nexus of CG reform and firm performance in a developing country. The findings underscore apprehensions regarding the efficacy of instituting agential viewpoints for every nation.