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Found 6289 publications

Analytical and numerical investigation of jet engine vibration equation using least square homotopy perturbation method

Muhammad Rafiq Hijaz Ahmad Taha Radwan Muhammad Tahir Mussarat Begum

Publication Name: Journal of Low Frequency Noise Vibration and Active Control

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This research focuses on solving the nonlinear second-order jet engine vibration equation utilizing a hybrid analytical technique named the least square homotopy perturbation method (LSHPM). The numerical and graphical comparison of the solutions obtained using the homotopy perturbation method (HPM), LSHPM, and the MATLAB built-in solver bvp5c is presented across four distinct cases. Additionally, a comparative analysis between the solutions derived from LSHPM and those reported in previous literature is also presented. The tabular and graphical representation of the solutions, along with the numerical validation through residual error analysis, are given. Furthermore, the convergence analysis of the LSHPM for its stability and solution reliability is provided. The graphical and numerical representation of the residual error analysis reveals that LSHPM exhibits superiority over HPM in terms of rapid convergence and accuracy. The strong agreement between the results obtained from HPM and bvp5c with those of LSHPM demonstrates that LSHPM offers a more efficient, reliable, and fast convergent solution of the initial and boundary value problem.

Open Access: Yes

DOI: 10.1177/14613484251413078

Controlled Fuzzy 2-Metric Spaces: A Soft Computing Framework with Dynamic Applications

Clemente Cesarano Osama Oqilat Hijaz Ahmad Tarapada Bag Abhishikta Das Waleed Mohammed Abdelfattah Dipti Barman Osama Oqilat

Publication Name: International Journal of Analysis and Applications

Publication Date: 2026-01-01

Volume: 24

Issue: Unknown

Page Range: Unknown

Description:

In this article, we introduce the concept of a controlled fuzzy 2-metric space, formulated by incorporating three control functions that flexibly regulate the fuzzy distance relationships among triplets of points. This structure provides a flexible analytical tool for modeling systems influenced by uncertainty, interdependence, and approximate reasoning. We establish several fundamental properties of this structure and derive fixed-point results. To demonstrate its practical relevance, we apply the proposed framework to a dynamic market-equilibrium problem, in which agents’ interactions are governed by fuzzy relations and control-dependent adjustments. The study also discusses implications for soft computing and decision-making systems, highlighting the framework’s potential in modeling adaptive and uncertain environments.

Open Access: Yes

DOI: 10.28924/2291-8639-24-2026-110

Comparison and complete mitogenomes of two morphologically similar but ecologically different tick species, Ixodes arboricola and Ixodes lividus (subgenus Pholeoixodes)

Jenő Kontschán Attila D. Sándor Tim Warbroek Tijs J.M. van den Bosch Paulina Lesiczka Gergő Keve Andor Pitó Nóra Takács Sándor Hornok

Publication Name: Ticks and Tick Borne Diseases

Publication Date: 2026-01-01

Volume: 17

Issue: 1

Page Range: Unknown

Description:

Ixodes arboricola and Ixodes lividus are ornithophilic tick species. The former is typically associated with tree-hole dwelling birds, while the latter is a host-specific parasite of sand martins (Riparia riparia). These two tick species share important morphological characters that make them difficult to identify when they are collected from atypical hosts, such as birds of prey. Despite this, high resolution digital pictures have not been reported to compare I. arboricola and I. lividus, nor was their complete mitogenome reported. The aim of this study was to compensate for this lack of illustrations and sequence data. Nymphs and females of I. arboricola and I. lividus were used for morphological comparison, and one specimen of each species to generate mitogenome sequences. The results showed that females of these two species are different in the shape of their scutum, porose areas, the length of basis capituli, palps, coxae, genital pore, anal groove and tarsus I. On the other hand, nymphs of I. arboricola and I. lividus can be distinguished according to their cervical grooves, cornuae, auricular ridges and spiracular plates. The mitochondrial genome size was 14,539 and 14,536 bp, for I. arboricola and I. lividus, respectively. The mitogenome sequences of I. arboricola and I. lividus were 91.1% identical to each other. Phylogenetic analysis of Ixodes species showed that I. arboricola and I. lividus are sister species, and cluster together with Ixodes crenulatus/canisuga under strong support. In conclusion, results of this study confirmed that the front of the basis capituli is crucial in distinguishing Ixodes species, especially in the subgenus Pholeoixodes where these two species are phylogenetically closest related to I. canisuga. Another phylogenetically relevant morphological character is the scutal surface which is wrinkled (rugose) as a common feature of Pholeoixodes species in the clade of I. arboricola and I. lividus (including I. canisuga, I. rugicollis and I. ariadnae). Although the host ranges of I. arboricola and I. lividus do not substantially overlap, they may transmit some of the shared pathogens. Relevant data indicate that the eco-epidemiological significance of the two ornithophilic tick species studied here may in part be similar and they may play a role in the transmission of rickettsiae, borreliae and viruses of which birds act as reservoirs.

Open Access: Yes

DOI: 10.1016/j.ttbdis.2025.102589

Primary Sector Value Addition and Environmental Performance in BRICS: The Roles of Environmental Policy Stringency and Green Innovation

Sakiru Adebola Solarin Naif Alsagr P. Németh Péter Németh Shahid Ali Sakiru Adebola Solarin

Publication Name: Land Degradation and Development

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

In recent decades, the BRICS countries have experienced rapid economic growth, much of which has been driven by agriculture, natural resource extraction, and industrial exports. However, the continued expansion of these sectors is accompanied by growing environmental vulnerabilities. While value addition in agriculture, forestry, and fishing is crucial for development, it is also widely acknowledged as a contributor to land degradation. Against this backdrop, this study examines the impact of agriculture, forestry, and fisheries value added on environmental performance in the BRICS countries over the period of 1990–2023. This study is the first to integrate agricultural, forestry, and fishing (AFF) value added, natural resource rents, green innovation, environmental policy stringency, and greenhouse gas (GHG) emissions into a single framework, with an emphasis on the BRICS countries. We employ quantile regression to uncover how these relationships differ across different levels of the distribution of GHG emissions. As a robustness check, we use the bootstrap quantile regression approach, which estimates coefficients and standard errors through a bootstrapping procedure. The results show that primary sector value addition is positively related to GHG emissions. However, renewable energy consumption, environmental policy stringency, total natural resource rents, and green innovation negatively affect GHG emissions.

Open Access: Yes

DOI: 10.1002/ldr.70481

Dynamic investigation of composite metal foams using substructure techniques

B. Pere Márió Kovács

Publication Name: International Journal of Structural Integrity

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: 1-18

Description:

Purpose – The accurate characterisation of the dynamic behaviour of inhomogeneous materials is a challenging task. Examples of such materials are composites, which are becoming increasingly common in the industrial world. Wave propagation studies in these materials, which are hard to model, are usually very complicated and difficult or even impossible to generalise to other composites. The authors aim to develop a special, easy-to-use finite element method to investigate wave propagation in any composite in a memory-efficient and accurate way. Design/methodology/approach – The study combines the substructure technique, a method published in the 1970s, with the central difference method (CDM) in a specific way. This can be called as Combined Method (CM). It is important to note that CM and CDM are completely identical in accuracy, as using the substructure technique is only an equation rearrangement. Findings – For metal matrix syntactic foams (MMSFs), it has been shown that CM can significantly decrease the memory requirements of the finite element models without loss of accuracy. Moreover, it greatly reduces the time-consuming construction of large-scale inhomogeneous finite element models. The comparison between the CDM and CM shows that the larger the model in which the wave propagation is investigated, the greater the advantage of CM. Originality/value – The CM methodology is not only applicable to the study of the wave propagation characteristics of MMSFs, but can easily be transferred to the study of other composites.

Open Access: Yes

DOI: 10.1108/IJSI-11-2025-0306

Entrepreneurship education as a driver of sustainable innovation and community development

Szabolcs Ramhap Petra Kinga Kézai Agnieszka Skala-Gosk

Publication Name: Asian Education and Development Studies

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: 1-21

Description:

Purpose – In the contemporary higher education landscape, there is an increasing emphasis on the integration of entrepreneurship education (EE) as a strategic tool to address societal challenges. However, there is a paucity of research that explores the manner in which EE contributes to sustainable innovation and community development in Central and Eastern Europe (CEE). Design/methodology/approach – A multiple-case study was conducted of three representative programmes from Hungary and Poland. Institutional and policy documents, programme materials, evaluations and official statistics were triangulated and then synthesized cross-culturally against predefined criteria. Findings – The following models have been identified as exemplars of best practice in this field: (1) Centrally coordinated, curriculum-embedded models [for example, Hungary’s Hungarian Startup University Program (HSUP)] that broaden access via credits, stipends and national coverage and (2) decentralized, ecosystem-anchored pathways (for example, Poland’s Aula Polska, PFR School of Pioneers and WUT’s Startup Entrepreneurship) that deepens community embeddedness through peer learning, mentoring networks and problem-driven projects. Across cases, entrepreneurship education fosters human-capital formation, opportunity recognition in green and social domains and university–community linkages; persistent challenges include high dropout rates, fragmented governance and weak long-term impact tracking. Originality/value – The present study demonstrates how governance design conditions EE’s sustainability contribution pathways, which are comprised of the following three elements: mindset formation, project-based experimentation and community and industry interfaces. HSUP primarily focuses on scaling inclusive access and early prototyping at the national level, while the Polish programmes primarily seek to strengthen local innovation communities and promote translational learning. The study contributes to the refinement of theory on entrepreneurial universities by establishing a correlation between EE design choices and sustainable innovation and community development mechanisms in CEE. Furthermore, it offers actionable implications for programme evaluation and funding.

Open Access: Yes

DOI: 10.1108/AEDS-09-2025-0455

Vibration Spectrum of an Act-and-Wait Controlled System With Significant Damping

Mate Antali P. Szalai

Publication Name: Iet Control Theory and Applications

Publication Date: 2026-01-01

Volume: 20

Issue: 1

Page Range: Unknown

Description:

Act-and-wait concept in control theory is a tool for enhancing the control quality by decreasing the destabilising effect of time delay. As was shown in other works, applying the act-and-wait concept to a PD position control increases the available range of proportional gains, which reduces the steady-state error of dry friction. In this paper, we focus on the vibration phenomena at the boundaries of the dynamic stability from the aspect of the vibration spectrum. We consider a single-degree-of-freedom mechanical model of DC actuators that contains significant effective damping. At different types of stability limits, new analytical and semi-analytical results are derived for the vibration spectrum. The results are validated by numerical calculations and experiments on a linear DC actuator.

Open Access: Yes

DOI: 10.1049/cth2.70111

Innovating for Net-Zero: Collaborative and Digital Decarbonisation Strategies in Sunset Industries' Global Value Chains

Muhammad Mustafa Kamal Narain Gupta Attique ur Rehman Justin Zuopeng Zhang Ashem Emmanuel Egila Remsei Sándor Jianwen Zheng

Publication Name: Business Strategy and the Environment

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Global net-zero ambitions require transformative strategies to decarbonise carbon-intensive global value chains (GVCs). This study examines how multinational enterprises (MNEs) in sunset industries integrate carbon capture technologies (CCT) with operational and supply chain dynamics (OSCD) to advance decarbonisation. Drawing on institutional theory (InsT) and dynamic capabilities theory (DCT), we investigate how external decarbonisation pressures activate internal capability routines that shape the adoption of technological and supply chain innovations. Using qualitative insights from 55 industry professionals across energy-intensive sectors, we analyse how firms navigate regulatory fragmentation, mobilise early-stage decarbonisation investments and develop collaborative and digital mechanisms to support low-carbon transitions. The findings reveal that coercive and normative pressures primarily stimulate sensing and seizing capabilities, while transforming capabilities develop more gradually through experiential learning and organisational reconfiguration. Firms often pursue hybrid CCT–OSCD strategies, combining technological interventions with operational and supply chain adjustments to manage institutional complexity. This study contributes theoretically by offering an integrated InsT–DCT framework that explains how institutional constraints and dynamic capabilities interact to enable decarbonisation in sunset industries. Managerially, the findings identify priority capability areas, including policy sensing, digital resource mobilisation and supply chain reconfiguration that can accelerate decarbonisation across global value chains.

Open Access: Yes

DOI: 10.1002/bse.70762

Gender and Power: Financial Independence and Women's Relational Empowerment in the Global South

Daniel Wheatley Jessica Lichy Loga Devi Balla Soupramanien Melina Doargajudhur Soujata Rughoobur-Seetah Zuberia Hosanoo

Publication Name: Gender Work and Organization

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This study adopts a positive and contextually grounded representation of married women in Global South (GS) countries through the theory of gender and power (TGP) and Kabeer's empowerment framework, to examine factors driving financial independence (FI) and empowerment among women in Mauritius and Zimbabwe. Drawing on 55 in-depth interviews with married women (28 in Mauritius and 27 in Zimbabwe), findings indicate that gendered power relations and institutional forces are pivotal in shaping empowerment for married women. Three interconnected themes emerged: “societal and institutional factors,” “context-embedded financial independence and autonomy,” and “women's relational empowerment.” Theoretically, we intersect Kabeer's empowerment framework with the TGP to illustrate how FI operates at the nexus of resources, agency, gendered power relations, and structural constraints, both aligning with and challenging universalized assumptions in gender, development, and empowerment research. Empirically, the paper advances scholarship by providing nuanced insights into empowerment processes within under-researched GS contexts.

Open Access: Yes

DOI: 10.1111/gwao.70123