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Found 6423 publications

Thalia dealbata, a new host of sugarcane mosaic virus

László Palkovics Réka Sáray János Ágoston Dóra Pinczés Asztéria Almási Katalin Salánki

Publication Name: Journal of Plant Pathology

Publication Date: 2023-05-01

Volume: 105

Issue: 2

Page Range: 587-588

Description:

No description provided

Open Access: Yes

DOI: 10.1007/s42161-022-01295-9

Predictive equations for soil shear-wave velocities of Hungarian soils based on MASW and CPT measurements around Győr

P. Tildy Orsolya Kegyes-Brassai Richard P. Ray

Publication Name: Acta Geodaetica Et Geophysica

Publication Date: 2016-12-01

Volume: 51

Issue: 4

Page Range: 685-707

Description:

Determination of shear-wave (S-wave) velocity profiles is the first step in seismic hazard assessment of a town, because the dynamic parameters of local soil types are vital for seismic response analysis of a specific area in order to determine the local soil effect in a case of a seismic event for seismic risk analysis. S-wave velocity profiles have been determined for many areas within Győr. Extensive use of historical boring logs allowed for correlations and reasonable extrapolation of soil performance throughout the area. This has led to a pattern of soil layer distributions and delineates several different soil zones for Győr.

Open Access: Yes

DOI: 10.1007/s40328-015-0148-y

Impact of Climate Change on Electric Energy Production from Medium-Size Photovoltaic Module Systems Based on RCP Climate Scenarios

Norbert Bozsik András Szeberényi Nándor Bozsik

Publication Name: Energies

Publication Date: 2024-08-01

Volume: 17

Issue: 16

Page Range: Unknown

Description:

The impact of climate change is increasingly evident in various domains today and is gaining prominence in scientific inquiries. Climate change also affects the utilisation of renewable energies. The article examines the effects of 21st-century climate change on the annual electric energy production of medium-sized photovoltaic module systems. The study bases its analysis on three possible scenarios: a pessimistic (RCP 8.5), a less pessimistic (RCP 4.5), and an optimistic (RCP 2.6) scenario. The applied Representative Concentration Pathways (RCP) scenarios were developed by the Intergovernmental Panel on Climate Change (IPCC) to enhance comparability in analyses related to climate change. Compared to older linear models, an innovation utilises a more flexible and multidirectional model. One of the article’s key findings is that, for all three examined settlements, the annual yield of the studied photovoltaic systems will surpass the levels of the base year 2010 by the middle and end of the century. Another significant outcome is that, under the three scenarios analysed, the ratio of annual performance variation to annual global radiation variation shows substantial differences by the middle and end of the century compared to the 2010 baseline. In the optimistic scenario, this ratio exceeds 1, whereas in the pessimistic and less pessimistic scenarios, it falls below 1. This ratio does not directly inform about the annual production—which increases in all cases—but rather about the changes in efficiency. These efficiency changes are influenced by the rise in annual average temperatures and the fluctuation in sunny hours yearly. The third finding reveals that under the climate change pessimistic scenario (RCP 8.5), the efficiency decrease is less adverse than in the less pessimistic scenario (RCP 4.5).

Open Access: Yes

DOI: 10.3390/en17164009

New Ways of Career Orientation for the Automotive Scope: Future Engineer Program of University of Győr Zalaegerszeg Innovation Park

Dániel Róbert Szabó Renáta Tóth-Pákozdi

Publication Name: International Journal of Automotive Science and Technology

Publication Date: 2025-12-17

Volume: 9

Issue: 1st Future of Vehicles Conf.

Page Range: 82-89

Description:

Today’s rapid developments have resulted in a change in students’ attitudes and their attitude to learning. In order to provide effective education, it is necessary for educational institutions to understand these changes in attitudes and to adapt the organisation and methodology of education accordingly. In addition, institutions need to take on new roles in an era of globalisation and rapid technological change in order to contribute to social and economic development. In this respect, teaching methods based on practicality may come to the fore; the use of inductive approaches may be an excellent response to this new challenge. The university preparatory course of the University of Győr - Zalaegerszeg Innovation Park builds on the above. The Future Engineer - ZalaZONE is a 6-week series of special, unique elements; a set of methods aimed at introducing and familiarising secondary school students with research and project-based education and practical skills, while at the same time supporting the university’s engineer career orientation. Since 2023, the course has been organised on six occasions, engaging 100 participants. A further unique and special feature of the programme is the creation of a course covering automotive topics, targeting secondary school students in the Zalaegerszeg Innovation Park environment, especially in a strong connection of R&D activities, industrial services and academic partnership. Briefly, this article brings a new look to the existing literature in the following areas: (I) alig ning inductive, practice-centred approaches (IBL/PBL) with the evolving learning attitudes of Generation Z and Alpha; (II) documenting the design of a university preparatory course embe dded in a science-park ecosystem that integrates R&D infrastructure and academic partnership; and (III) demonstrating a transition from subject-based instruction toward integrated automotive themes that stimulate complex, experience-based learning.

Open Access: Yes

DOI: 10.30939/ijastech.1757986

Influence of frequency resolution in case of frequency response function measurement in structural dynamics

Balázs Vehovszky Zoltán Gazdagh

Publication Name: Acta Technica Jaurinensis

Publication Date: 2021-11-24

Volume: 14

Issue: 4

Page Range: 508-520

Description:

Frequency resolution is an essential parameter in acoustical testing, even if we are using numerical or experimental method, for example when determining frequency response function (FRF) of a dynamic mechanical system, or executing modal analysis based on the FRFs. Finer resolution leads to more accurate results, at the expense of longer calculation/measurement process and larger data size. This parameter is generally set based on rules of thumb, prior practice or with big margin for safety. This results in waste time and data storage if the required frequency resolution is overestimated, or even significant errors in the results, if it is underestimated. Present paper offers a direct, method for the conscious determination of optimal frequency resolution. It is based fully on theoretical considerations, and investigates amplitude and phase distortion at resonances as target parameters. Beside defining the steps of the process, it is tested on a real structure, and the results are presented as well, proving the applicability and the appropriateness of the method. With this method, development engineers get a practical tool for adjusting the parameters of dynamic measurements and simulations.

Open Access: Yes

DOI: 10.14513/actatechjaur.00618

Cooperation in multiagent systems

Claudiu Radu Pozna Péter Földesi Radu Emil Precup János Kovacs

Publication Name: Sisy 2011 9th International Symposium on Intelligent Systems and Informatics Proceedings

Publication Date: 2011-10-26

Volume: Unknown

Issue: Unknown

Page Range: 195-200

Description:

This paper gives aspects related to a cooperation scenario in the framework of multiagent systems. The presentation is focused on a multiagent system that consists of two agents, the Master and the Apprentice. The theoretical basis of the cooperation scenario is the definition of the most probable process, and two algorithms are used with this regard. The formulation of the cooperation scenario is exemplified for a case study that builds an architecture of successively placed bricks in the workspace. © 2011 IEEE.

Open Access: Yes

DOI: 10.1109/SISY.2011.6034321

Testing the Setup Parameters of 3D Printed Parts Using a 7-axis Measuring Arm

Robert Magai Balazs Molnar

Publication Name: International Journal of Automotive Science and Technology

Publication Date: 2025-12-17

Volume: 9

Issue: 1st Future of Vehicles Conf.

Page Range: 35-40

Description:

Additive manufacturing, particularly Fused Deposition Modeling (FDM), has become a widely adopted technique in prototyping and small-series production. This is primarily due to its high flexibility and cost-effectiveness. However, ensuring dimensional accuracy remains a significant challenge, especially for functional components with tight tolerances. The aim of this study is to investigate the effect of two fundamental FDM parameters, layer height and print speed, on geometric accuracy. Nine configurations were tested by combining three-layer heights (0.1 mm, 0.2 mm, 0.3 mm) with three print speeds (40 mm/s, 60 mm/s, 80 mm/s). The test specimens were printed using an Ultimaker S7 printer with PLA Extrafill filament and subsequently remeasured using a 7-axis Hexagon Absolute Arm coordinate measuring arm. Each part was evaluated at seventeen predefined geometric features, resulting in a total of 153 measurement data points. Deviations were analyzed in comparison with the nominal CAD model values. The results indicate that the combination of 0.2 mm layer height and 60 mm/s print speed (L2S2) yielded the smallest deviations and the most consistent accuracy. Undersizing was typically observed for holes located in the XY-plane, while features along the Z-axis exhibited greater variation. The findings highlight the necessity of coordinated parameter optimization to improve dimensional accuracy.

Open Access: Yes

DOI: 10.30939/ijastech.1753463

Infinite-temperature spin dynamics in the asymmetric Hatsugai-Kohmoto model

Ádám Bácsi Doru Sticlet Balázs Dóra Cǎtǎlin Paşcu Moca

Publication Name: Physical Review B

Publication Date: 2025-10-14

Volume: 112

Issue: 15

Page Range: Unknown

Description:

We focus on the infinite-temperature dynamical spin structure factor of the asymmetric Hatsugai-Kohmoto model, a relative of the asymmetric Hubbard model. It is characterized by distinct single-particle energies for the two spin species, which interact with each other through a contact interaction in momentum space. We evaluate its spin structure factor exactly and follow the evolution of its excitation spectrum for all fillings and interactions, identifying signatures of the Mott transition and fingerprints of the asymmetric hoppings. The longitudinal spin structure factor exhibits soundlike and interaction-induced gapped excitations, whose number gets doubled in the presence of hopping asymmetry. The transverse response displays the competition of interaction- and asymmetry-induced gaps and results in a quadratic excitation branch at their transition. The complete asymmetric case features a momentum-independent dynamical structure factor, characteristic of transitions involving a flat band.

Open Access: Yes

DOI: 10.1103/7bc3-3jz9

Creation of Slag-Containing Composite Material Prototypes Using Powder Metallurgy Methods

Meruyert E. Utegenova Marzhan Sadenova Petar Sabev Varbanov

Publication Name: Engineering Technology and Applied Science Research

Publication Date: 2025-10-06

Volume: 15

Issue: 5

Page Range: 26555-26563

Description:

This study explores the powder metallurgy methods for obtaining slag-containing composite materials that can be utilized in the ceramic industry, and especially in catalysis, as raw materials for the production of building materials, and also as refractories. The main components of the synthesized samples of composite materials are natural aluminosilicates from the east of Kazakhstan and metallurgical slag of lead production. Varying the content of components in the range: slag 10-30 wt.%, bentonite clay 30-40 wt.%, and natural zeolite 40-60 wt.%, a pilot batch of composite materials was obtained. The results show that the samples had high mechanical strength, ranging from 20.7 to 50.53 MPa, after sintering at a temperature of 1000 °C.

Open Access: Yes

DOI: 10.48084/etasr.11991