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Found 6278 publications

Oestrogens and oestrogenic substances in plant cultivation

Pál Szakál Judit Plutzer Eduard Gubó

Publication Name: Agrokemia Es Talajtan

Publication Date: 2019-01-01

Volume: 68

Issue: 2

Page Range: 385-401

Description:

A compound is oestrogenic, when -even if with low affinity but can bind to oestrogen receptors (ER)- resulting in a biological effect in oestrogen sensitive cells, which are similar to processes caused by the ovarian derived oestrogen hormones. According to literature data, due to slurry irrigation and intensive livestock manure application, due to the direct contact with the land, steroidal oestrogens, including oestrogen E1, oestradiol E2, oestriol E3, and synthetic oestrogen EE2 are ubiquitous in the fertile soil. Plants can accumulate oestrogens in their roots and shoots, which when entering the food chain may have an impact on human health. Slurry can only be applied to agricultural land with the permission of the soil protection authority, which also determines the amount of slurry that can be applied to the area. The different types of slurry differ not only in their nutrient composition but also in their EDC content. Regarding the natural hormone excretion and use of hormonal preparations it is important to consider the sex ratio and age range of livestock in the case of selection. It is important for the future that we carry out toxicological studies and place greater emphasis on the amount and potential effects of hormonal substances released by agricultural side products.

Open Access: Yes

DOI: 10.1556/0088.2019.00002

Nonlinear finite element method in magnetism

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2009-08-01

Volume: 4

Issue: 2

Page Range: 13-24

Description:

The paper presents and compares three potential formulations to solve nonlinear static magnetic field problems by applying the fixed-point technique and the Newton-Raphson scheme. Nonlinear characteristics have been handled by the polarization method in the two algorithms. The proposed combination of Newton-Raphson scheme and the polarization formulation result in a very effective nonlinear solver, because only the derivate of the characteristics, i.e. only the permeability or the reluctivity has to be used. That is why, this method can be prosperous to solve nonlinear problems with hysteresis, and it is faster than the classical fixed-point method.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.2.2

Analysis of railway vehicles' bogies with different wheel forces

László Bozóky Vince Nagy

Publication Name: Proceedings of the Mini Conference on Vehicle System Dynamics Identification and Anomalies

Publication Date: 1996-12-01

Volume: Unknown

Issue: Unknown

Page Range: 203-213

Description:

For the past ten years, geometry and loaded tests on railway bogies are in progress at the Department for Automotive and Railway Engineering of Szechenyi Istvan College. Following analysis of running and driven bogies and laboratory measurements, operating test of running vehicles has also been conducted. Initial results made it possible to perform different theoretical and computer analysis.

Open Access: Yes

DOI: DOI not available

Modelling and Sensitivity Analysis of Nonlinear Firefighting Systems Using Maple

F. Hajdu Rajmund Kuti G. Y. Molnarka

Publication Name: Communications in Computer and Information Science

Publication Date: 2021-01-01

Volume: 1414

Issue: Unknown

Page Range: 234-251

Description:

Mathematical modelling and numerical simulations have greatly contributed to the development of technical sciences in the recent decades. With powerful tools, like Maple, the examination of ever newer engineering applications in simulation environment was made possible. This paper gives an overview of mathematical modelling and numerical examination of nonlinear fire truck suspension systems using Maple. The examined models are the suspension system of a heavy-duty fire truck with different degrees of freedom and a special double-cabin fire truck suspension system with a crew compartment. The construction of mathematical models, their implementation to Maple and the numerical simulation results are explained. Detailed One-at-a-Time sensitivity analysis results using a novel fuzzy logic based evaluation method developed in Maple are also presented. With the proposed method an extended parameter range can be examined and the parameters can be easily compared. From the sensitivity analysis it was concluded that the spring characteristics and the road models greatly affect simulation results.

Open Access: Yes

DOI: 10.1007/978-3-030-81698-8_16

Understanding intentions towards seeking university-business partnerships – analysing four european cases

Zsolt Kohus Katalin Czakó Zoltán Baracskai

Publication Name: Journal of International Studies

Publication Date: 2021-01-01

Volume: 14

Issue: 2

Page Range: 228-244

Description:

It is an important economic and social issue for universities to provide value for their communities by seeking and maintaining partnerships with local firms. This paper analyses institutions of different national economies. It systematises the differences and similarities in the communication of universities aiming to partnering. To this end, we present four European cases from France, Germany, Hungary and Poland. The methodology lies in its grounded theory approach to a continuous multi-case analysis. Our hypotheses are as follows: There are role differences of universities in the observed cases (H1). There are different understandings behind fruitful university-business partnerships (H2). The rate of diversification in local industries effects the presence and types of university services and business partnering activity (H3). Data hubs were extracted from institutional communications and integrated with local economic data input. The novel approach of applying the grounded theory supports complex observation. Notions of fruitful partnerships are institution-specific, but we identify two opposite perspectives of strategies to run efficient university-business partnering. The structure of the local industrial environment, research output and university-business interactions have definable mutual effects.

Open Access: Yes

DOI: 10.14254/2071-8330.2021/14-2/15

Effects of 2 consecutive badminton matches on motor and cognitive abilities among adult elite badminton players An observational study

József Tollár Gergely Sántha György Áfra Emese Reinhardt-Varga Eszter Bíró

Publication Name: Medicine United States

Publication Date: 2024-12-27

Volume: 103

Issue: 52

Page Range: e40947

Description:

The goal of our study was to investigate the effect of 2 consecutive badminton matches among elite badminton players on visuomotor integration, dynamic balance ability, inhibitory control, short-term memory capacity, and changes in cardiovascular fitness. Badminton is the fastest racket sport regarding the speed of the shuttle leaving the racket. The play with open move skills is characterized by series of short range and high intensity workload phases. The effectiveness is affected by the execution of the specific movement techniques within a certain time period and the optimal function of decision-making techniques. The experiment included a tournament with 2 simulated matches among elite, adult, male badminton players. The quality of visuomotor integrity and dynamic balance task were measured with Blazepod modified adapted Y-Balance Test induced reactive balance test, pre and post matches. Stroop test was used to evaluate the inhibition capability, and Digit Span Test was applied to measure the cognitive short-term capacity. Remarkable changes could not be detected in the visuomotor reaction in each time points. Gradual increase was observed in balance errors due to the dominant leg (right) support. Digit Span Test decreased between pre and post match measurements, however, significant changes (P < .01) could be detected after the restitution period between pre and post match. No alteration could be seen with Stroop test in each time points, nevertheless, notable increase in false results were observed at the 4th measurements points. Heart rate did not remarkably differ. In summary, the intensive, consecutive strength had a negative effect on peripheral system, and therefore on dynamic balance control. Cognitive ability indicated gradual deterioration, but showed optimal regeneration between loads.

Open Access: Yes

DOI: 10.1097/MD.0000000000040947

Correspondences between Hungarian women's marital names and the traditional family schema

Judit Baranyiné Kóczy

Publication Name: Cognitive Linguistic Studies in Cultural Contexts

Publication Date: 2021-01-01

Volume: 14

Issue: Unknown

Page Range: 151-183

Description:

A marital name makes a statement about women's cultural values with respect to their family schemas. In Hungary, adopting the husband's full name by marriage is no longer required, thus women have the opportunity to choose from seven different name structures. The paper aims to uncover the motivations behind women's preference for marital name structures as influenced by the traditional family schema that they maintain in their background. Data for this analysis is extracted from a questionnaire distributed to 533 women, which seek to obtain information on key elements of the traditional family schema. Results do not reveal a direct correlation between the selection of marital names and any single component of the traditional family schema; however, overall the results of the survey outline a systematic correspondence between marital names and women's conformity or non-conformity to the traditional family schema. In conclusion, the various marital name structures reflect diverse family schemas, in particular, they are representatives of Hungarian women's different extent of adherence to the traditional family schema.

Open Access: Yes

DOI: 10.1075/clscc.14.08koc

Evaluation of travel behaviors in order to prepare travel plans for residential areas and schools of gyor

Petra Szakonyi Emese Mako

Publication Name: Pollack Periodica

Publication Date: 2013-12-01

Volume: 8

Issue: 3

Page Range: 69-78

Description:

The municipality of Gyor participated in the last five years in two Intelligent Energy Europe projects (Pro Motion project, Travel Plan plus project), which aim was to deliver transport-sector energy savings by creating a new approach to site-based mobility management across Europe. During the development of the two projects there has been worked out two Local Travel Plans, one for the residential area Menfocsanak, in the city, Gyor and one for the educational institutions of Gyor. The first one is a so called 'area travel plan' and the second one is a so-called 'work travel plan'. The aims of these studies were to reduce CO2 emission caused by private car users and to promote sustainable mobility choices for the residents of the area and for students. In order to solve the future mobility challenges in a sustainable way it is necessary to analyze the existing travel demand and modal-split caused by target groups (residents and students).It is important to develop Local Travel Plans for residential areas and schools, based on quantitative travel behavior data, which can be used for modeling of current and future transport to provide optimized solutions for daily mobility. It is very important to collect data from various sources according to the needed detail of a Travel Plan.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.3.7

Evaluation of Indirect Storage Location Systems by Fuzzy Signature

Tamás Hartványi Zoltan Andras Nagy Miklós Szabó

Publication Name: Chemical Engineering Transactions

Publication Date: 2025-01-01

Volume: 121

Issue: Unknown

Page Range: 115-120

Description:

Traditional storage systems often rely on direct access storage locations, but these solutions can be inefficient and environmentally exhausting due to higher energy consumption and limited scalability. In previous studies, we demonstrated that higher efficiency could be achieved with indirectly-accessible storage systems compared to fully directly accessible ones. To compare the different layouts, we developed a simulation model through which warehouse operations were executed. The resulting time values became comparable, allowing us to rank the solutions. However, the conventional method of calculating simple averages, often applied in the evaluation of logistic performance, has limited capacity to capture the complexity of data distributions and the small differences between individual observations. The aim of this study is to interpret warehouse operations from a new perspective using a fuzzy logic-based model, explicitly addressing the research gap that traditional statistical averages cannot adequately capture subtle performance differences. The novelty of our contribution lies in applying fuzzy signatures to warehouse simulation, which enables more precise differentiation between competing system layouts. During the simulation analysis, traditional average values are compared using a classification method based on fuzzy sets, demonstrating that this new approach is more sensitive to performance fluctuations and better reflects real operational conditions. This approach supports the selection of the most suitable storage system for warehouse operations, the initial placement of products, or the operational process that best aligns with emerging demands, enabling greater energy savings and enhancing the overall sustainability of the system.

Open Access: Yes

DOI: 10.3303/CET25121020