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A megismerés és az értelmezés konstrukciói Tanulmányok Tolcsvai Nagy Gábor tiszteletére

Komlósi László Imre

Publication Name: Magyar Nyelv

Publication Date: 2015-01-01

Volume: 111

Issue: 2

Page Range: 239-244

Description:

No description provided

Open Access: Yes

DOI: 10.18349/MagyarNyelv.2015.2.244

Dynamic Changes in Systemic Inflammatory Indices Predict Residual High-Grade Lesions After Margin-Positive Cervical Conization: A Multicenter Retrospective Study

Barbara Sebők Márton Keszthelyi Kornél Lakatos Lotti Lőczi Richárd Tóth Balázs Vida Verita Szabó Ádám Tabányi Gabriella Vajda Nándor Ács Balázs Lintner

Publication Name: Cancers

Publication Date: 2026-04-01

Volume: 18

Issue: 7

Page Range: Unknown

Description:

Background/Objectives: Cervical cancer remains a global health burden. The loop electrosurgical excision procedure (LEEP) is effective for cervical intraepithelial neoplasia. Positive margins often complicate decisions about repeat conization. HPV testing is standard in post-treatment surveillance, but its limited specificity shows the need for additional, cost-effective biomarkers. This study evaluated whether changes in systemic inflammatory indices—platelet-to-lymphocyte ratio (PLR), systemic inflammation response index (SIRI), and systemic immune-inflammation index (SII)—can predict residual high-grade lesions after incomplete excision. Methods: This multicenter retrospective study included 125 patients who underwent repeat surgery after LEEP due to positive margins. Changes in preoperative inflammatory indices (ΔPLR, ΔSIRI, ΔSII) between the first and second procedures were analyzed by the histopathological findings of the second surgery. Group differences were assessed using the Mann–Whitney U test, and receiver operating characteristic (ROC) analysis was used to evaluate discriminatory performance. Results: Significant differences were found in ΔPLR (p = 0.032) and ΔSII (p = 0.048) between patients with and without residual high-grade lesions or invasive cancer. ΔSIRI showed borderline significance (p = 0.050). For invasive cancer alone, ΔSIRI was significantly associated with malignancy (p = 0.035). ROC analysis showed modest predictive performance (AUC ≈ 0.60). Conclusions: Dynamic changes in PLR, SIRI, and SII may be as inexpensive adjunct biomarkers to support risk stratification after incomplete LEEP and can complement HPV testing in certain clinical settings.

Open Access: Yes

DOI: 10.3390/cancers18071114

Script-Based Material and Geometrical Modeling of Steel–Concrete Composite Connections for Comprehensive Analysis Under Varied Configurations

János Szép Majid Movahedi Rad Daniel Gosztola Péter Grubits

Publication Name: Applied Sciences Switzerland

Publication Date: 2025-03-01

Volume: 15

Issue: 6

Page Range: Unknown

Description:

The behavior of steel–concrete composite structures is significantly influenced by the efficiency of the shear connections that link the two materials. This research examines the performance of stud shear connectors, with an emphasis on analyzing the effect of different geometric design parameters. A computational model was created utilizing Python 3.13 to enable thorough digital monitoring of the influence of these parameters on the structural performance of composite connections. Developed within the ABAQUS framework, the model integrates geometric nonlinearity and the Concrete Damage Plasticity (CDP) approach to achieve detailed simulation of structural behavior. Essential design aspects, including stud diameter, stud height, head dimensions, and spacing in both longitudinal and transverse directions, were analyzed. The Python-based parametric model allows for easy modification of design parameters, ensuring efficiency and minimizing modeling errors. The significance of stud diameter changes was analyzed in accordance with Eurocode standards and previous studies. It was found that stud length has a reduced effect on structural performance, particularly when considering the concrete properties used in bridge construction, where compressive failure of the concrete zone is more critical at lower concrete strengths. Additional factors, such as stud head dimensions, were investigated but were found to have minimal effect on the behavior of steel–concrete composite connections. Longitudinal stud spacing emerged as a critical factor influencing structural performance, with optimal results achieved at a spacing of 13d. Spacings of 2d, 3d, and 4d demonstrated overlapping effects, leading to significant performance reductions, as indicated by comparisons of ultimate load and force–displacement responses. For transverse spacing, closer stud arrangements proved effective in reducing the likelihood of slip at the steel–concrete interface, enhancing composite action, and lowering stress concentrations. Additionally, reducing the transverse distance between studs allowed for the use of more shear connectors, increasing redundancy and enhancing performance, especially with grouped-stud connectors (GSCs).

Open Access: Yes

DOI: 10.3390/app15063095

Investigation of frequency dependent mechanical properties of porous materials using dynamic mechanical analyzer and frequency-temperature superposition theory

Balázs Vehovszky Attila Schweighardt

Publication Name: Proceedings of Inter Noise 2021 2021 International Congress and Exposition of Noise Control Engineering

Publication Date: 2021-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

In acoustic design of engineering applications - such as in the acoustic analysis of passenger vehicles - poroelastic materials are of great importance. One of the most influencing properties in determining their noise-reduction potential is the storage modulus. The purpose of this study is to examine the frequency dependence of storage modulus of selected porous acoustic materials at least up to 1000 Hz. This is executed by using the combined use of dynamic mechanical analyzer and frequency-temperature superposition theory. All other methods for measuring the storage modulus fall short in determining frequency-dependence above 100 Hz: quasi-static mechanical analyzer is mostly used for determining an averaged constant value deduced from low-frequency measurements, while the usage of an electromagnetic shaker capable for high-frequency excitation may include effects of fluid motion inside the pores, thus significantly modifying the results. Frequency-temperature superposition enables to determine the storage modulus values in a wide frequency range, based on low-frequency measurements, where fluid-structure interaction is negligible. It was found that the modulus varied significantly up to and beyond 1000 Hz, and thus, acoustical characterization of these materials can be significantly improved using the proposed method. The work concludes with recommendations to improve the accuracy of the results.

Open Access: Yes

DOI: 10.3397/IN-2021-2859

Renewable energy and the macroeconomic space in India: A Bayesian VAR approach

Gagan Deep Sharma Anshita Sachan Swapnanil SenGupta

Publication Name: Renewable Energy

Publication Date: 2026-04-01

Volume: 261

Issue: Unknown

Page Range: Unknown

Description:

India's rapid rise as a global renewable energy producer is occurring alongside a significant economic transformation. The present study explores the relationship between renewable energy production (REN) and key economic drivers, namely, Gross Domestic Product (GDP), foreign direct investment (FDI), trade openness, patents, oil production, and public-private participation in energy over the period from 1990 to 2021. Using a Bayesian Vector Autoregression (BVAR) framework, we uncover nonlinear and time-varying effects: patents stimulate renewable output but with diminishing returns, FDI consistently suppresses growth in renewables, GDP exhibits an inverted U-shaped relationship, and trade openness follows a U-shaped trajectory. Oil production initially supports but later crowds out renewable generation, while private investment shows delayed positive effects after an initial drag. Variance decomposition highlights a shift from self-driven dynamics in the short run toward macroeconomic and structural determinants in the long run, with GDP, FDI, and R&D increasingly explaining variation in REN over time. The findings posit that renewable energy in India is both a driver and a product of wider economic shifts, calling for policies that synchronise innovation, trade, finance, and energy governance to ensure a resilient low-carbon transition.

Open Access: Yes

DOI: 10.1016/j.renene.2026.125298

Modeling enablers for blockchain adoption in the circular economy

Horst Treiblmaier Suhaiza Zailani John G. Keogh Abderahman Rejeb Karim Rejeb

Publication Name: Sustainable Futures

Publication Date: 2022-01-01

Volume: 4

Issue: Unknown

Page Range: Unknown

Description:

Blockchain technology can play a crucial role to facilitate the transition from a linear to a circular economy. This article evaluates those enablers that influence technology adoption in the circular economy. A comprehensive literature review and feedback from experts revealed nineteen critical enablers. The Decision-Making Trial and Evaluation Laboratory (DEMATEL) methodology was used to determine the cause-and-effect relationships between them. The findings identified five critical causal enablers: transparency, security, smart contracts, traceability, and enhanced collaboration. Effect enablers were identified as immutability, decentralization, privacy, automation, information sharing, and enhanced regulation.

Open Access: Yes

DOI: 10.1016/j.sftr.2022.100095

Gender Differences in Environmental Attitudes: An Analysis Using the NEP Scale

Nikolett Gyurián Nagy Nikolett Gyurián Nagy

Publication Name: Gender Issues

Publication Date: 2025-03-01

Volume: 42

Issue: 1

Page Range: Unknown

Description:

This study initially conducted a systematic literature review to examine gender differences in environmental orientation (EO) using the New Ecological Paradigm (NEP) scale. Following PRISMA guidelines, 38 studies were selected from a total of 168, providing a comprehensive overview of the existing research on the topic. Based on the insights gained from the review, a large sample survey was then conducted to explore further the differences in EO between male and female consumers. The results were compared with previous studies employing similar methodologies. The central research question is: Does gender identity influence EO as measured by the New Ecological Paradigm (NEP) scale? The NEP scale is a well-established instrument for assessing environmental attitudes. The significance of this topic lies in the potential impact of differing attitudes among gender groups on the effectiveness of communication and comprehension. Understanding these differences is crucial for developing strategies for sustainable development through targeted and effective messaging. Our findings indicate that women exhibit a higher NEP orientation, suggesting they are more aware of environmental concerns than men. The systematic review also confirmed this trend, with the majority of studies reporting higher environmental awareness among women. Additionally, women demonstrate greater awareness of related problems and a higher willingness to change their behavior to reduce their environmental impact. In contrast, men’s attitudes are more varied, reflecting a broader diversity of opinions within this group.

Open Access: Yes

DOI: 10.1007/s12147-024-09349-1

Safety Assessment of Different Stability Design Rules for Beam-columns

G. Hajdú F. Papp

Publication Name: Structures

Publication Date: 2018-06-01

Volume: 14

Issue: Unknown

Page Range: 376-388

Description:

In EC3-EN 1993-1-1, there are three different methods to check the global stability resistance of steel columns, beams, and beam-columns. The design formulas are based on buckling curves, which are available for purely compressed or purely bended members with uniform cross-sections. Beam-columns are subjected to compressive force and the bending moment can be designed using the so-called interaction formula where the interaction factors may be alternatively determined. Over the past few years, many research groups have worked on correcting and improving the accuracy of the available design methods for steel members. The aim of this paper is to compare the accuracy of the different revised methods for steel beam-columns. In order to investigate the accuracy of the above-mentioned design methods, numerous geometrically and materially nonlinear analyses with imperfections (also known as GMNIA) were executed by previous research projects. The results of the semi-probabilistic safety assessments may help the designer choose the most reasonable method for their design works.

Open Access: Yes

DOI: 10.1016/j.istruc.2018.05.002

On the Challenges of Mutual Interference between Cable Television Networks and Mobile Fixed Communication Networks in the Digital Dividend Bands

Péter Vári Hussein Taha Szilvia Nagy

Publication Name: Infocommunications Journal

Publication Date: 2022-09-01

Volume: 14

Issue: 3

Page Range: 63-71

Description:

Recently, the issue of monitoring and repairing leakage from cable television networks have re-emerged, particularly after the International Telecommunication Union released a part of the ultra-high frequency spectrum to mobile broadband services. The newly allocated spectrum, known as the digital dividend bands, was traditionally used throughout Europe for digital TV broadcasting. The emerging problem is the mutual interference between the new frequency spectrum utilized by the Mobile/Fixed Communication Networks and the band used by cable TV providers to offer their services. This article is a brief overview and a starting point for extensive research in this area. We started with a simple description of the cable television system and mobile/fixed communication networks focusing on the aspects associated with ingress and egress interference issues. We also discussed the approaches for detecting and measuring mutual interference and reviewed the relevant literature. This article is concluded with some proposed measures for reducing or mitigating mutual interference.

Open Access: Yes

DOI: 10.36244/ICJ.2022.3.8