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Found 6383 publications
Seasonal Analysis of Match External Load in Hungarian Second-Division Professional Football Across Three Competitive Seasons Using GPS-Derived Match-Average Data
Publication Name: Sports
Publication Date: 2026-04-01
Volume: 14
Issue: 4
Page Range: Unknown
Description:
Background/Objectives: The aim of this study was to describe seasonal trends in match-average External Load (EL) variables across three (2022/23, 2023/24, 2024/25) consecutive competitive seasons in a Hungarian professional second-division soccer team (Gyirmót FC Győr), using the Catapult Vector S7 Global Navigation Satellite System (GNSS). Specifically, Average Distance (AD; m), Average Player LoadTM (PL; AU), and Acceleration–Deceleration Efforts (>2 m·s−2) (ADE) were examined. The study aimed to provide descriptive reference values and characterize seasonal variation in match EL demands within a professional second-division context. Methods: A descriptive seasonal comparison was conducted based exclusively on aggregated match average EL values. The unit of analysis was the match, with each match contributing one aggregated value per variable derived from players who completed the full match. A total of 94 matches were included (2022/23: N = 38; 2023/24: N = 29; 2024/25: N = 27); matches with red cards were excluded. EL data were collected using a 10 Hz Catapult Vector S7 GNSS. Results: The median AD decreased continuously from the 2022/23 season (10.210 m) to the 2024/25 season (9.795 m). The median PL decreased from 1002 (2022/23 and 2023/24) to 846 in the 2024/25 season. The median ADE decreased from 220.8 (2022/23) to 199.0 (2024/25). Conclusions: Lower values were observed across match EL variables, with the most pronounced reduction in PL. These findings provide descriptive reference values and may support the interpretation of seasonal variation in match EL demands in professional second-division soccer.
Open Access: Yes
Characterization of stress serrations in AlMg alloys
Publication Name: International Journal of Lightweight Materials and Manufacture
Publication Date: 2025-11-01
Volume: 8
Issue: 6
Page Range: 805-814
Description:
A set of parameters was developed to characterize the stress serrations produced by the Portevin-Le-Chatelier (PLC) effect, including the stress amplitudes and their frequency and time functions. In addition to the traditional Fast Fourier Transform (FFT), the Short Time Fourier Transform (STFT), which can simultaneously display the amplitude as function of time and frequency, proved to be very illustrative. This made it possible to identify type A and type B serrations, as well as their appearance in the spectrum. Based on this evaluation method, six different cold rolling and annealing variants of an AlMg3 alloy were analyzed. It was found that in the cold-formed and annealed versions of sheets an FFT amplitude peak uniformly appears at 4–10 Hz, which can be attributed to the PLC serration of type A. This peak continuously decreases in the case of the annealed sheets, while cold-formed sheet shows a new peak at approximately 18–20 Hz before the uniform strain, which indicates the appearance of type B serrations. The amplitude of stress serrations decreases with increasing yield strength, tensile strength and normal anisotropy, and increases with uniform and fracture strains and hardening exponent.
Open Access: Yes
Phylogenetic analysis of Plenodomus lingam and Plenodomus biglobosus isolates in Hungary
Publication Name: Journal of Plant Diseases and Protection
Publication Date: 2023-08-01
Volume: 130
Issue: 4
Page Range: 875-882
Description:
Blackleg (stem canker) of crucifers is a globally important disease caused by multiple genetic subclades of the fungi Plenodomuslingam (syn.: Leptosphaeria maculans) and Plenodomus biglobosus (syn.: Leptosphaeria biglobosa). In our study, we monitored the geographical distribution of these two pathogen species from rapeseed growing areas in Hungary. Multiplex PCR identified 48.7% of the isolates as Plenodomus biglobosus, which indicates the non-recent introduction of the pathogen into Hungary. In addition, multi-locus analysis revealed low genetic diversity within the species, as all isolates were clustered to the Plenodomuslingam ‘brassicae’ and Plenodomus biglobosus ‘brassicae’ subclades. The low genetic diversity of a population generally means reduced adaptation potential, which is essential information in breeding and in developing more effective management strategies.
Open Access: Yes
Development of production logistics system based on lean principles
Publication Name: International Conference on Industrial Logistics Icil 2012 Conference Proceedings
Publication Date: 2012-01-01
Volume: Unknown
Issue: Unknown
Page Range: 349-355
Description:
This paper acquaints the production logistics system about a Hungarian operating vehicle part manufacturing company, including its examination, and development opportunities. This paper's highlighted objectives are the preparation and analysis of the basic data of development recommendation. Moreover, it demonstrates lean based outsourcing strategies which could significantly reduce the company's handling demands.
Open Access: Yes
DOI: DOI not available
Pinch analysis for sustainable development: A cross-disciplinary review of developments from 2018 to 2025
Publication Name: Renewable and Sustainable Energy Reviews
Publication Date: 2026-07-01
Volume: 235
Issue: Unknown
Page Range: Unknown
Description:
Since the 1970s oil crisis, Pinch Analysis (PA) has been employed as a heat recovery guidance tool to address the need for energy conservation. With the continuous improvement of the theoretical system and the ongoing innovation of the methodology, PA has not only been deepened and developed within the energy domain but has also been extended to other important problem domains, enabling optimal resource utilisation and becoming an indispensable analytical methodology for the integration of process industries. This review builds upon a critical review published in 2018 and summarises the recent advancements (2018 to the present) of PA in the domains of process modelling and energy optimisation, energy system process integration, resource network optimisation, freshwater integration, carbon emissions integration, plastics management networks, and energy-water-carbon nexus. It also summarises the tools used by PA methods and looks at the future development of PA in various fields. The main findings of this review are: 1) PA has evolved in recent years towards multi-methodology, multi-dimensionality and multi-objectives, as well as a greater focus on dynamic adaptability when dealing with complex application scenarios; and 2) according to the reported data of works reviewed in this paper, a diversified and effective tool chain and specialised tool (e.g. Aspen, Water Pinch, CEPA) can achieve up to 75% savings in energy consumption and resources in specific industrial cases.
Open Access: Yes
Experimental and Numerical Analysis of Steel-Polypropylene Hybrid Fibre Reinforced Concrete Deep Beams
Publication Name: Polymers
Publication Date: 2023-05-01
Volume: 15
Issue: 10
Page Range: Unknown
Description:
This work experimentally and numerically explored how varied steel-polypropylene fibre mixtures affected simply supported reinforced concrete deep beams. Due to their better mechanical qualities and durability, fibre-reinforced polymer composites are becoming more popular in construction, with hybrid polymer-reinforced concrete (HPRC) promising to increase the strength and ductility of reinforced concrete structures. The study evaluated how different combinations of steel fibres (SF) and polypropylene fibres (PPF) affected beam behaviour experimentally and numerically. The study’s focus on deep beams, research of fibre combinations and percentages, and integration of experimental and numerical analysis provide unique insights. The two experimental deep beams were the same size and were composed of hybrid polymer concrete or normal concrete without fibres. Fibres increased deep beam strength and ductility in experiments. The calibrated concrete damage plasticity model in ABAQUS was used to numerically calibrate HPRC deep beams with different fibre combinations at varied percentages. Based on six experimental concrete mixtures, calibrated numerical models of deep beams with different material combinations were investigated. The numerical analysis confirmed that fibres increased deep beam strength and ductility. HPRC deep beams with fibre performed better than those without fibres in numerical analysis. The study also determined the best fibre percentage to improve deep beam behaviour where a combination of 0.75% SF and 0.25% PPF was recommended to enhance load-bearing capacity and crack distribution, while a higher content of PPF was suggested for reducing deflection.
Open Access: Yes
Immigration and regional competitiveness - Relevant theories in the migration research and in the regional science
Publication Name: Deturope
Publication Date: 2018-01-01
Volume: 10
Issue: 1
Page Range: 71-81
Description:
International and interregional migrations, the geographic form of human mobility have a number of social, economic and political effects. These impacts can vary depending on the reference period, region or sector as well as on the goals and aspects of our interpretation. Another important question in connection with regional competitiveness is how decision makers act and react after perceiving migratory movements. Analysing the interference between immigration and regional development, we can rely on the well-known migration theories, however, a comparison of further models and concepts relating development and regional issues can be more useful for researchers. These questions are relevant, since the issues of the regional science, such as regional competitiveness and regional policy, have in the background strong associations with migratory phenomena. The aim of this study is to introduce the theoretical background, summarizing the mainstream solutions and the controversies as well. Thus the first part presents the role of the migration theories and these of the regional science in connection with the linkages between immigration and regional competitiveness. Besides it points out the importance of immigrants' inclusion. The next section focuses, complemented with the outcomes of a multivariate statistical analysis, on the theories on determinants and causalities of migration, exploring the connecting points with the issues of the regional policy.
Open Access: Yes
Development and parasitism of the horse-chestnut leafminer, Cameraria ohridella, in different leaf types and canopy levels
Publication Name: Acta Phytopathologica Et Entomologica Hungarica
Publication Date: 2009-12-01
Volume: 44
Issue: 2
Page Range: 277-293
Description:
Authors provide a 6-year study about aspects of development of Cameraria ohridella and its parasitoids in different leaf types of horse-chestnut trees. Investigations were carried out near Hédervár, North-West Hungary between 1999 and 2004.It was ascertained that in large leaves at low foliage levels as well as in large leaves exposed to direct sunlight developed more moths than in other leaf types of equal quantity (i.e. equal number of leaflets). On the other hand, there were not considerable differences between shaded and sun-exposed leaves in this regard if their quantity is measured in grams. Moreover, comparing the numbers of hatched moths per unit leaf weight, the values for minute leaves were the highest. The differences were explained on the basis of diverse microclimatic conditions in the mines, height preference of the moth or variations in dry weights per unit leaf area.Parasitism of Cameraria ohridella showed significant yearly differences between canopy levels and a tendency of changes during the years. Parasitism was higher in shaded than in sun-exposed leaves. Lowest values were found in minute leaves among all leaf types investigated what was explained with a presumed foraging behaviour of the parasitoids.Structure and species constitution of the parasitoid community and its changes in time are discussed in different leaf types. Temporal changes of several characteristics found in different leaf types refer to an adaptation process of the horse-chestnut leafminer. © 2009 Akadémiai Kiadó.
Open Access: Yes
Rethinking the Set of Concepts—Applying Expert Analysis by the Workshop Method
Publication Name: Studies in Fuzziness and Soft Computing
Publication Date: 2024-01-01
Volume: 427
Issue: Unknown
Page Range: 33-43
Description:
The contradictions of the historical data with the six-component model necessarily led to a refinement of the FCM model. The parts of the system under discussion are systems in themselves, and to investigate their deeper structure is essential to understanding the operation of the system. The subsystems form this way a system of systems”. Up-to-date engineering systems are often extremely complex, and they are usually composed of a multitude of interacting units, which are called subsystems. In areas where expert assessment is crucial, the process of expert participation in workshop form may ensure that the various opinions and interests are integrated into synergies and this way, sustainable solutions sought for can be found as a result of joint decision-making. Regional Waste Management Systems (RWMS) are also such complex systems where expert domain knowledge plays an important role, and which can always be subdivided into interconnected or separate subsystems and elements, where a number of factors has to be reconsidered and determined by an expert panel. These factors are usually complementary, in some cases conflicting or competing; but essentially the subsystems and subsystem elements influence each other and determine the overall operation of the system. In this Chapter, it will be shown how the workshop technique may result in a much more refined model, which may be the start of a model without contradictions and fully adequately simulating the real life system. The aim of the workshop designed and realised in the case study, described in the Chapter as a suitable method was to analyse the starting model and to construct an efficient new model of RWMSs, with more factors. The workshop method was applied in group sessions and plenary discussions. Expert teams were encouraged to develop a common, unified model of the system under investigation. This approach could hopefully help resolve the conflicts and disagreements in the previous model, and also, among certain experts’ opinions. In the case study, as a result, a more refined model was developed indeed, however, then the problem emerged, how to build up, how to deal with, and how to evaluate this rather complex model.
Open Access: Yes
