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Publications - 6383

Stochastic Breather and Soliton Dynamics of a Third-Order Complex mKdV (Higher-Order NLS-Type) Equation

Hadi Rezazadeh Younis A. Sabawi Hijaz Ahmad Taha Radwan Li Ming

Publication Name: Journal of Nonlinear Mathematical Physics

Publication Date: 2026-12-01

Volume: 33

Issue: 1

Page Range: Unknown

Description:

This study presents a comprehensive investigation of optical solitary waves governed by a third-order complex modified Korteweg-de Vries (higher-order nonlinear Schrödinger-type, mKdV-NLS) equation incorporating stochastic effects. Initially, the methodology outlines the general procedure of this approach. Subsequently, by applying the traveling waves transformation to the given equation, it is reformulated into nonlinear ordinary differential equations (NLODEs). These NLODEs are then decomposed into their imaginary and real components. Furthermore, the proposed methodology is implemented to derive new solutions for optical solitary waves within the mKdV-NLS type model, encompassing stochastic breather-like waves, singular solitons, periodic waves, and various wave interactions. Additionally, numerical visualizations of the exact analytical solitary waves are provided, facilitating an examination of the stochastic term’s influence on wave dynamics. This study advances the understanding of optical wave behavior and clarifies the effects of stochastic contributions, offering valuable insights for both theoretical studies and practical applications in optics and related fields.

Open Access: Yes

DOI: 10.1007/s44198-025-00367-5

CONTROLLABILITY OF THE TIME-VARYING FRACTIONAL DYNAMICAL SYSTEMS HAVING MULTIPLE DELYAS IN CONTROL WITH CAPUTO FRACTIONAL DERIVATIVE

Ilker Ozsahin V. Govindaraj Berna Uzun Hijaz Ahmad Taha Radwan K. S. Vishnukumar S. M. Sivalingam

Publication Name: Fractals

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The objective of this study is to analyze controllability results for time-varying linear and nonlinear fractional dynamical systems with multiple control delays within the framework of the Caputo fractional derivative. This paper focuses on examining control problems within a finite time interval, aiming to identify a control function that steers the system’s solution from a specified initial state to a targeted final state. For linear systems, the study establishes necessary and sufficient conditions for controllability by utilizing the Grammian matrix techniques. For nonlinear systems, the existence of a solution is ensured through an iterative technique, with completeness of the space guaranteed. With the help of this technique, we establish the sufficient conditions for the controllability of time-varying nonlinear fractional dynamical systems. The results show that the controllability of fractional dynamical systems can be effectively analyzed with the given framework, along with numerical simulations and graphical representations to clarify the theoretical findings.

Open Access: Yes

DOI: 10.1142/S0218348X26400025

Mitigating harmful content on social media via platform regulation: The Digital Services Act and content assessment

Gergely Gosztonyi János Tamás Papp Gergely Ferenc Lendvai

Publication Name: Informacios Tarsadalom

Publication Date: 2025-01-01

Volume: 25

Issue: 2

Page Range: 59-72

Description:

The Digital Services Act (DSA) implements a legal framework for digital services, including social media platforms, to ensure that they operate in responsible, accountable ways. With an objective involving three critical theoretical pillars—transparency, accountability, and responsibility—the DSA, among other functions, (mostly) holds online platforms liable for content that they publish and also imposes requirements that they mitigate and remove harmful content. However, from a critical standpoint, the DSA begs some pivotal questions. For one, how can such a legal document, even if binding, mitigate the severe societal, psychological, emotional, and even physical dangers and detriments experienced by victims of social media abuse? For another, how can a supranational regulation combat local disinformation campaigns and political propaganda? In this article, we encourage not only introducing, analyzing, and critically examining the DSA but also propose policy recommendations to ameliorate content moderation on social media platforms.

Open Access: Yes

DOI: 10.22503/inftars.XXV.2025.2.4

Hydrogen Policy Environment in the European Union, Current Status of Policy Uptake

András Torma Péter Németh Barna Hanula

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 499-504

Description:

Hydrogen (H2) can become a crucial technology in building an independent and resilient energy infrastructure. The production and utilisation of green hydrogen will play a crucial role in the energy environment of the European Union in the future. Several strategies were defined, and policy actions were taken. H2 has a comparably high lower heating value and no direct harmful emission during use, so it presents a viable alternative for conventional energy carriers. Independently from the final form of usage, H2 will play a key role in integrating green electricity into the grid, as according to the state-of-the-art, large-scale, long-term energy storage is only feasible in molecules containing H2. H2-based mobility solutions could offer a viable technology for sustainable transportation. This article investigates H2 production and demand in the EU, as well as the directives and incentives of the EU to accelerate H2 production and H2 technologies in general. Based on the existing policies and applications, it reviews the up-to-date status of policy uptake within the EU and gives insights into the different preparedness for the transition to a H2-based energy system of the Member States.

Open Access: Yes

DOI: 10.3303/CET23107084

Achieving Sustainability in EU Tenders for Hungarian Universities

Mónika Rajcsányi-Molnár Márta Konczos Szombathelyi Nóra Mária Halmai

Publication Name: Journal of Sustainability Research

Publication Date: 2026-03-01

Volume: 8

Issue: 1

Page Range: Unknown

Description:

The research examines the elements and factors affecting the sustainability conditions of tenders implemented by universities. The actuality of the topic is justified by the strengthening of the universities’ three missions and the emergence of the sustainability aspect, notably its prominent appearance among strategic goals. This study analyzes Hungarian calls for European Union structural funds over two programming periods, focusing on how the conceptual and conditional system of sustainability is integrated to support the Higher Education Institutions (HEIs)’ evolving innovative and third mission role. Regarding the method, the analysis focused on tender documentation from the Széchenyi 2020 (HRDOP) and the strategic guidelines for Széchenyi Plan Plus (EDIOP Plus) (2014–2027). A qualitative content analysis was performed on seven HRDOP calls. Agusdinata’s Human-Centered Design (HCD) and Shared-Action Learning (SAL) framework were utilized to assess the alignment of the calls’ objectives with sustainable development goals (SDGs), particularly concerning the cooperation of the quadruple/quintuple helix actors. The findings indicate that the HRDOP calls’ target system encompasses the elements of the sustainability framework. While sustainability is often indirectly supported, project conditions serve as guidelines for HEIs to undertake SDG-aligned activities. The subsequent EDIOP Plus priorities further emphasize collaboration and cover all framework elements, though relationships with civil society and the educational mission require increased institutional self-contribution. It can be concluded that defining and highlighting these aspects provides guidance during project planning, enhancing the long-term sustainability of university tenders and regional impact.

Open Access: Yes

DOI: 10.20900/jsr20260016

A Localized Multi-level Method of Fundamental Solutions for Inhomogeneous Problems

Csaba Gáspár

Publication Name: Lecture Notes in Computational Science and Engineering

Publication Date: 2025-01-01

Volume: 153 LNCSE

Issue: Unknown

Page Range: 345-354

Description:

A localization technique is proposed to solve some elliptic problems based on the classical Schwarz overlapping method. The original problem is converted to solving a sequence of subproblems (which are much less than the original problem) resulting in an iterative method. The local problems are solved by the Method of Fundamental Solutions. The localization technique makes it possible to apply the method to inhomogeneous problems and to more general problems as well. The method can be embedded into a natural multi-level context, which significantly improves the computational efficiency. As a further application, the proposed method is applied to the scattered data interpolation problem.

Open Access: Yes

DOI: 10.1007/978-3-031-86173-4_35

Generation and Evaluation of CPT Data Using Kriging Interpolation Technique

Ayele Chala Richard P. Ray

Publication Name: Periodica Polytechnica Civil Engineering

Publication Date: 2023-01-01

Volume: 67

Issue: 2

Page Range: 545-551

Description:

The cone penetration test (CPT) has been the de facto field exploration method in geotechnical engineering for decades. Variations of CPT can measure parameters for seismic, environmental, and hydrological applications. Analyzing response often requires properties in areas that have little or no data. Therefore, given the limited CPT data, it is critical to understand how to accurately estimate the soil properties at unsampled locations. In this paper, we generated soil shear wave velocity profiles using the kriging interpolation technique and assessed their performance using site response analysis. Four kriging interpolation-based shear wave velocity profiles and four additional CPT-based shear wave velocity profiles defined site conditions for response analysis. We performed a series of 1-D equivalent linear site response analyses using STRATA software. The site response analysis results are presented as amplification factors (AF), peak ground acceleration (PGA) profiles, surface spectral acceleration, and surface acceleration time histories. Compared to CPT-based profiles, the results of kriging interpolation-based profiles were evaluated and discussed. The results confirmed the reliability of the kriging interpolation technique in predicting soil parameters at unsampled locations.

Open Access: Yes

DOI: 10.3311/PPci.21865

Data-Based Assembly Patterns for Overall Equipment Effectiveness at Semi-Automatic Assembly Lines

János Jósvai Péter Dobra

Publication Name: Periodica Polytechnica Mechanical Engineering

Publication Date: 2022-01-01

Volume: 66

Issue: 3

Page Range: 231-236

Description:

In industrial practice, production planning is a key factor for manufacturers and suppliers. The entire planning process spans from the appearance of the customer demand to the fulfillment of the demand. Operational execution is based on pre-planned production processes and operations using properly allocated resources. The accurate planning of assembly operations within production is an extremely complex process in terms of efficiency. Predicting stochastically variable efficiencies is difficult due to the ever-changing manufacturing conditions. This paper defines typical assembly process situations for a semi-automatic assembly line and examines their consequence for the Overall Equipment Effectiveness (OEE). Firstly, a literature review demonstrates the scientific relevance. Secondly, the classification of patterns based on assembly process description parameters is described taking into account the positive and negative effects on the OEE. In addition, the assembly patterns and their characteristics are illustrated through a real automotive example.

Open Access: Yes

DOI: 10.3311/PPme.19910

Model oriented enterprise integration: Metamodel for realizing the integration

Maria Raffai

Publication Name: IFIP International Federation for Information Processing

Publication Date: 2008-01-16

Volume: 255

Issue: Unknown

Page Range: 807-816

Description:

The main task of IT-specialists in the last decades was to develop applications supporting different business functions and processes. For today the enterprises are well equipped with IT-devices and applications, but in most cases they run separately in various business units and/or on different platforms, they work with data stored not only redundant but also in other forms. Consequently there is an urgent need for integrating systems and fulfilling the entrepreneurs', customers', citizens' needs for on-line inter-organizational cooperation. © 2008 International Federation for Information Processing.

Open Access: Yes

DOI: 10.1007/978-0-387-76312-5_1