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Publications - 6374

Validity of a 2-km Walk Test in predicting the maximal oxygen uptake in moderately active Hungarian men

Géza Zakariás R. Laukkanen M. Petrekanits

Publication Name: European Journal of Sport Science

Publication Date: 2003-12-01

Volume: 3

Issue: 1

Page Range: 1-8

Description:

The present study examined whether prediction models based on the 2-km UKK Walk Test (UWT) are valid for predicting the maximal oxygen uptake or maximal aerobic power (VO2max) in moderately active Hungarian men. Eightyseven 24-62 year old, non-athletic, sedentary or moderately physically active men were studied. Maximal aerobic power was measured in a maximal uphill walk exercise test on a treadmill. The walking tests were performed on a 400-m outdoors athletic track. The subjects walked 2 km (5 laps) as briskly as they could. VO2max was predicted with the formula as established in the original development study of the UWT. The total error of prediction and the correlation coefficient between the laboratory measured and UWT predicted VO2max (ml · kg-1 · min-1) were 4.6 and 0.85. The Bland-Altman analysis showed a good agreement between the methods, with the mean error of prediction 0.05 ml · kg-1 · min-1. The results verify that the UWT can be used as a reasonably valid test for predicting maximal aerobic power in Hungarian men. © 2002 by Human Kinetics Publishers and the European College of Sport Science.

Open Access: Yes

DOI: 10.1080/17461390300073104

Opportunities within the meat supply chain in Africa-The case of beef production in Northern Ghana

Laszlo Vasa Imre Vida Áron Vaskó

Publication Name: Plos One

Publication Date: 2022-01-01

Volume: 17

Issue: 1

Page Range: Unknown

Description:

Developing food supply chains in the African agriculture could be one of the keys for higher value-added activities and for the fair income of the stakeholders along the chains. Our research aims to investigate how these agricultural value chains are working in Northern Ghana and how to develop them. To estimate meat demand in the Tamale Metropolis, we carried out a large-scale survey with more than 300 interviews. Furthermore, we also measured the awareness of processed meat products. Based on the results, our conclusions are as follows: Development of public services offers the opportunity to (1) gaining market power for ourselves while losing market power for others, (2) indirect takeover of control on political and civil societies while losing control for others, (3) to win allies and friends on one hand, potentially losing allies and friends on the other. After spatial analyses of grazing areas, animal markets, trading routes and witnessing the descriptions of basic macroeconomic differences within Ghana; we must conclude that live animal trade is south-orientated, where traders are able to bargain higher prices. Due to northern locational advantages, the price of animals could be reduced. The presumably cheaper workforce and dozens of unemployed young males could also alleviate the financial burdens.

Open Access: Yes

DOI: 10.1371/journal.pone.0260668

On the statistics of ELM filaments measured by fast low field side wall Langmuir probes on TCV

M. Berta G. Veres R. Pitts O. E. Garcia A. Bencze

Publication Name: 34th Eps Conference on Plasma Physics 2007 Eps 2007 Europhysics Conference Abstracts

Publication Date: 2007-12-01

Volume: 31

Issue: 2

Page Range: 820-823

Description:

No description provided

Open Access: Yes

DOI: DOI not available

Models for predicting the suction of heaving compacted soils using geotechnical properties

Elizabeth Theron Armand Augustin Fondjo R. P. Ray

Publication Name: Iop Conference Series Earth and Environmental Science

Publication Date: 2021-04-20

Volume: 727

Issue: 1

Page Range: Unknown

Description:

Soil suction is the major property that controls the behaviour of unsaturated soils. Suction estimation is challenging both in the lab and the field. Various instruments to measure the suction have been developed with the recent technological advancements. Nonetheless, there are still limitations in regards to the reliability, cost, suction range, accessibility, scope of activity, and appropriateness for use either within the field or lab settings. The filter paper method is probably the simplest procedure to measure the suction for the entire range both in the field and the lab. Nevertheless, the procedure takes time. To alleviate the requirement for conducting this test, it becomes imperative to develop mathematical predictive models for soil suction. In this study, a detailed survey was carried out across the Free State province, South Africa, and sampling points identified. Samples were tested for their geotechnical properties. The influence of the geotechnical properties on soil suction was studied. Multivariate regression analysis was carried out utilizing MINITAB 18 program to develop the mathematical predictive models.

Open Access: Yes

DOI: 10.1088/1755-1315/727/1/012016

Implementation of genetic based individualization of White stork (Ciconia ciconia) in forensic casework

Petra Zenke Gabor Kovacs Zsolt Pádár Balázs Egyed

Publication Name: Forensic Science International Genetics

Publication Date: 2019-05-01

Volume: 40

Issue: Unknown

Page Range: e245-e247

Description:

No description provided

Open Access: Yes

DOI: 10.1016/j.fsigen.2019.02.001

Evaluating the role of blue-green infrastructures in mitigating climate change: a case study of the Hungarian “Green City” program

Katalin Bene Attila Kálmán

Publication Name: Clean Technologies and Environmental Policy

Publication Date: 2026-05-01

Volume: 28

Issue: 5

Page Range: Unknown

Description:

Urban environments are increasingly vulnerable to climate change, with extreme weather events expected to become more frequent and severe. This paper addresses sustainable urban development and the importance of stormwater retention, integrating adaptation and mitigation strategies. It evaluates the publicly funded Hungarian “Green City” program’s water management, focusing on blue-green infrastructures. The 198 implemented projects in the program were assessed for green credentials, vegetation concepts, and rainwater retention using public databases of real municipal data and Google Earth spatial analyses rather than hypothetical scenarios. A lifetime climate change impact assessment with sensitivity analysis was conducted using two case studies from the “Green City” program, highlighting the benefits of prioritizing rainwater over tap water for irrigation. The study proposes a three-pillar—environmental as operational carbon footprint, economic as extended net present value (NPV), and social as accessibility and recreational benefit—evaluation method for urban blue-green developments. It found that many projects rely on tap water irrigation, thus resulting in higher lifetime carbon emissions. The financial assessment of carbon footprint within the extended NPV method emphasizes the need for improved green area irrigation strategies. By modernizing irrigation practices and implementing effective rainwater retention measures, blue-green infrastructures can significantly reduce carbon dioxide emissions while improving long-term economic performance and social benefits through improved usability. The research offers valuable insights into the role of blue-green infrastructures in urban development to combat climate change. The combined three-pillar framework integrating LCA to assess green projects is a transferable decision-support tool that can be adapted to locally available data, advocating the use of rainwater over tap water to achieve environmental, social, and economic benefits. Unlike earlier studies that used hypothetical scenarios, this research relies on the implemented projects of the “Green City” development program with their observed designs and available real data, thus providing a framework for urban blue-green implementations to integrate sustainable practices and effectively address the challenges posed by climate change.

Open Access: Yes

DOI: 10.1007/s10098-026-03501-z

The mechanical and the geometrical state of railway vehicle carriages

Lajos Borbás László Bozóky Vince Nagy

Publication Name: Proceedings 25th Danubia Adria Symposium on Advances in Experimental Mechanics Das 2008

Publication Date: 2019-01-01

Volume: Unknown

Issue: Unknown

Page Range: 181-182

Description:

No description provided

Open Access: Yes

DOI: DOI not available

The Analysis of Lifecycle and Multi-Criteria Decision-Making for Three-Generation High-Strength Recycled Aggregate Concrete

T. Horváth David Bozsaky M. Shmlls

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 229-234

Description:

The paper encompasses a comprehensive analysis of the life cycle of high-strength concrete (HSC), as well as a work on how HSC is made. Recycled concrete aggregate and multi-recycled concrete aggregate were utilized to partially replace natural aggregate (NA) in the production of the HSCs, while fly ash and silica fume were employed in place of cement. Firstly, the fresh state examination included a flow table test and compressive strength was tested at 28, 90, and 180 days. Moreover, the other aspects (cost and environmental life cycle) were considered to fulfill the sustainability of HSC, which might fit many applications in the building industry. The application of multi-criteria decision-making (MCDM) techniques can help in the development of sustainable concrete by identifying the best choice among multiple alternatives. Therefore, life cycle assessment (LCA) and MCDM technique, namely TOPSIS, were employed to select the best concrete mixture regardless of its generation. The output of the LCA is distributed as input for the TOPSIS technique. The results showed that the third generation of concrete, when compared to the first or second generation of recycled concrete, offers a more favorable alternative with acceptable technical performance, lower environmental impact, and less budget.

Open Access: Yes

DOI: 10.3303/CET23107039

Simulation Model Based Response Management Related to Railway (Earthquake) Disaster

Daniel Rohacs Anita Boros Sergey Kinzhikeyev József Rohács

Publication Name: Periodica Polytechnica Civil Engineering

Publication Date: 2022-01-01

Volume: 66

Issue: 1

Page Range: 40-49

Description:

Railway system as part of the general transportation system is a strategic element that supports the economy and the society. Its role is continuously rising with rapid industrialization, urbanization, and changes in the society expectations regarding sustainable systems. New and emerging technologies call and permit the augmentation of the railway systems’ disaster management. This paper deals with the development of an improved response management concept related to railways’ damage, caused by earthquakes. The paper synthetizes the latest technologies, engineering, and management methods in one improved response management system. After the concept inspiration, the paper describes the applicable novel models and introduces an improved response management being developed for railway systems, damaged by earthquakes. The concept is verified in simulation. The novelty includes a new approach in the identification of the critical infrastructure, the risk assessment, the prediction of aftershocks and the recursive application of the adaptive Markov process to the simulation supporting the response management concept.

Open Access: Yes

DOI: 10.3311/PPci.17578