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Found 6674 publications

Past-present-future in hungarian soil analyses

Csaba Centeri Renato Kalocsai Márton Vona Viktoria Vona István Mihály Kulmány István Attila Bakos Zsolt Giczi

Publication Name: Agrokemia Es Talajtan

Publication Date: 2020-12-01

Volume: 69

Issue: 1

Page Range: 127-151

Description:

The purpose of the present paper isAuthors aim was to deliver a compilation of to summarize the Hungarian soil analysies methods and theas well as to present the advisory system for nutrient management advisory system. Both of them are based on several decades of work. We need to should learn from these past experiences of reasonable and good agricultural practices. We can only apply the present and future results of soil science and find out what direction should we develop, if we were aware of the results of the past and we calculate with their governing effects. The majority of our recent methods are based on historical researches and the present current statesituation of our field of scientific fieldce can only be judged and developed further if we knew the former history of the methodological findings. The recent Hungarian soil analysis system provides useful results that can be used very well today, however, the adaptation of the new international methods, learned from the follow-up of the international trends can might provide open new perspectives in for the Hungarian laboratory analyses methodology. TThe subject is extremely timely because there are hea never- met demand for cost and time effective, environmentally friendly soil analysis methods underpin how actual and hot the topic is. nowadays.

Open Access: Yes

DOI: 10.1556/0088.2020.00061

Levél a Szerkesztoséghez: Cocker spániel hónalji árkában létrejött, egérárpa-(Hordeum murinum) tokiász által kiváltott, multiplex sipolyosodással járó tályogképzodés ellátása

Borisz Egri

Publication Name: Magyar Allatorvosok Lapja

Publication Date: 2019-09-01

Volume: 141

Issue: 9

Page Range: 546-547

Description:

No description provided

Open Access: Yes

DOI: DOI not available

A Fuzzy Framework for Assessing and Prioritizing Railway Infrastructure Retrofitting against Seismic Hazards – A Case Study

Szabolcs Fischer Amir Hajimirzajan Milad Kazemian

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2025-01-01

Volume: 22

Issue: 4

Page Range: 263-283

Description:

The railway system plays a crucial role in a nation's economy and society, extending beyond mere transportation. In earthquake-prone regions like Razavi Khorasan in Iran, railway infrastructure is highly vulnerable to natural disasters, which can severely disrupt train operations. Ensuring the safety of critical infrastructure, including stations, bridges, tunnels, and railway lines, is essential for maintaining operational integrity and public safety. This study evaluates and prioritizes seismic retrofitting measures for railway infrastructures in Razavi Khorasan. The fuzzy Delphi method is used to gather expert opinions, while the Fuzzy VIKOR method facilitates the prioritization process. Key assessment criteria include seismic intensity potential, vulnerability potential of the zone in terms of distance from the fault, the degree of criticality of the infrastructure in terms of the possibility of continuing transportation operations and the current state of the infrastructure in terms of the state of retrofitting against seismic hazards. The findings reveal critical railway segments that require immediate retrofitting interventions and highlight overall vulnerabilities within the system. This paper underscores the effective application of fuzzy logic methodologies in complex decision making scenarios, offering actionable recommendations to enhance the seismic retrofitting of railway infrastructures.

Open Access: Yes

DOI: 10.12700/APH.22.4.2025.4.16

From Over-Tourism to Under-Tourism via COVID-19: Lessons for Sustainable Tourism Management

Irum Shahzadi Gagan Deep Sharma Mandeep Mahendru Ravi Chatterjee Vibha Arora Irum Shahzadi

Publication Name: Evaluation Review

Publication Date: 2024-02-01

Volume: 48

Issue: 1

Page Range: 177-210

Description:

With various strains of the novel coronavirus emerging during the last few years, there is a need to reinvent and manage the tourism industry by engaging various stakeholders. Industry and policymakers need to observe the shift and curate tourism-related products and offerings accordingly. In light of the increasing demand for innovations and future directions in the post-COVID-19 period, this article conducts a bibliometric analysis for sustainable tourism studies spanning the years 1990–2021. This paper presents an integrative review of tourism, environment and sustainable tourism to reveal geographical, contextual, and methodological directions for future research. The comprehensive analysis includes contributions on topics and methods, country collaborations, and thematic analysis. The findings are consistent with the Sustainable Development Goals of sustainable production and consumption (SDG-12), with a particular emphasis on sustainable tourism to promote local culture and create jobs (SDG-12.b) and on sustainable growth (SDG-13). The study’s findings can be used to inform future policies and directions; for example, the findings indicate that the hospitality industry is facing challenges that necessitate new regulations to address its socioeconomic and environmental impacts.

Open Access: Yes

DOI: 10.1177/0193841X231189805

Recent studies on thermodynamic processes in nano-ceramic thermal insulation coatings

David Bozsaky

Publication Name: Pollack Periodica

Publication Date: 2019-01-01

Volume: 14

Issue: 1

Page Range: 107-116

Description:

Among nanotechnology-based thermal insulation materials thermodynamic performance of nano-ceramic coatings generates intensive discussions. Complete agreement has not been found yet about the mechanism of their insulating effect. In the Laboratory of Building Materials and Building Physics at Széchenyi István University (Győr, Hungary) heat transfer resistance experiments have been performed in order to describe thermodynamic processes inside nano-ceramic coatings. Previous studies finding after new measurements conducted in 2016-2017 also supported the former assumption that in case of nano-ceramic coatings convective heat transfer coefficient might be taken into account in a different way. Results also showed that thermal insulating effect of nano-ceramic coatings could be caused by a relatively high surface heat transfer resistance.

Open Access: Yes

DOI: 10.1556/606.2019.14.1.11

Antibacterial and anti-inflammatory activities of Cassia fistula fungal broth-capped silver nanoparticles

Gusztáv Fekete László Lendvai Kumari Jyoti Devender Arora Tej Singh G. Dogossy

Publication Name: Materials Technology

Publication Date: 2021-01-01

Volume: 36

Issue: 14

Page Range: 883-893

Description:

The growing need for sustainable technologies has attracted considerable interest in the synthesis of ecofriendly materials. This paper reports the anti-inflammatory and antibacterial activities of sustainable silver nanoparticles (AgNPs) fabricated using endophytic fungus extracted from a medicinal plant, Cassia fistula. Fourier transform-infrared and UV-visible were used for AgNPs characterisation. X-ray diffraction, scanning electron microscope, energy dispersive X-ray analysis, atomic force microscope (AFM), transmission electron microscope and dynamic light scattering analysis revealed that the biosynthesised AgNPs were within the size of ~4–54 nm. The synthesised AgNPs displayed considerable antibacterial activity against Staphylococcus aureus, Escherichia coli and Klebsiella pneumonia bacterial strains. Additionally, synthesised AgNPs showed significant anti-inflammatory potential.

Open Access: Yes

DOI: 10.1080/10667857.2020.1802841

Synergistic dynamics unveiled: Interplay between rare earth prices, clean energy innovations, and tech companies' market resilience amidst the Covid-19 pandemic and Russia-Ukraine conflict

Laszlo Vasa Grzegorz Mentel Xiaoming Yang Ashfaq Ahmad Md Monirul Islam

Publication Name: Resources Policy

Publication Date: 2024-02-01

Volume: 89

Issue: Unknown

Page Range: Unknown

Description:

Rare earth elements play a crucial role in supporting low-carbon energy generation technologies, such as electric motors in electric vehicles and the production of wind turbines. Additionally, these elements are utilized in a wide range of products manufactured by tech companies, including smartphones, aerospace components, and microelectronics. This paper aims to investigate the interplay between rare earth element prices (REMX), clean energy innovations (NEX), and the market of tech companies (PSE) from February 2018 to February 2023. To analyze the interdependencies between these markets, the study employs the cross-quantilogram (CQ) and wavelet local multiple correlation (WLMC) techniques. The findings of the investigation reveal a positive correlation between rare earth elements and the clean energy market, but only when both markets are in their respective extreme quantiles (10th and 90th). However, when the clean energy market is in a lower quantile and REMX is in a higher one for an extended period, there is either no significant interdependence or a negative relationship. Furthermore, the study identifies a positive co-movement between PSE and REMX in the short, intermediate, and extremely long-term. However, this relationship turns negative in the long run. The values of the coefficients fluctuate over time, particularly at larger scale periods of 8–16 when using the WLMC procedure. These findings have notable implications for stakeholders, including investors, managers, and policymakers, who are linked to the field of mineral resources and industries reliant on rare earth element-based technologies.

Open Access: Yes

DOI: 10.1016/j.resourpol.2023.104615

Some remarks to the nanowires grown on III-V substrate

Ákos Nemcsics L. M. Molnár Imre Mojzes Zsolt J. Horváth Szilvia Nagy Eniko Horváth

Publication Name: Asdam 2008 Conference Proceedings of the 7th International Conference on Advanced Semiconductor Devices and Microsystems

Publication Date: 2008-12-01

Volume: Unknown

Issue: Unknown

Page Range: 215-218

Description:

In the present work nanowires are investigated, which were prepared with the help of encapsulated metal induced growth method on GaAs and InP substrate. As our former investigations how, we can receive nanowires with substrate-like composition in the case of InP. In the case of GaAs substrate the situation is entirely different, while the growth technology in both cases was the same. The difference between the nanoproducts in the cases of different substrates originate in the reactivity of the components, which is explained in the following considerations. Furthermore we have observed that the diameter of the nanowires depends on the electron energy of the irradiation. If the electron beam was 5 kV and 20 kV, the diameter lasting increases and decreases, respectively. This effect can be explained by the change of the nanowires structure influenced by the electron beam. © 2008 IEEE.

Open Access: Yes

DOI: 10.1109/ASDAM.2008.4743320

Multilayer perceptron implemented by fuzzy flip-flops

László Gál Rita Lovassy László T. Kóczy

Publication Name: IEEE International Conference on Fuzzy Systems

Publication Date: 2008-11-07

Volume: Unknown

Issue: Unknown

Page Range: 1683-1688

Description:

The paper introduces a novel method for constructing Multilayer Perceptron (MLP) Neural Networks (NN) with the aid of fuzzy systems, particularly by deploying fuzzy J-K flip-flops as neurons. The next state Q(t+1) of the J-K fuzzy flip-flops (F3) in terms of input J can be characterized by a more or less S-shaped function, for each F3 derived from the Yager, Dombi, and Fodor norms and co-norms. In this approach, J represents the neuron input. The other input K is wired to the complemental output (K=1-Q), thus an elementary fuzzy sequential unit with a single input and a single output is received. The algebraic F3 having linear J-Q(t+1) characteristics is added to the above three. The paper proposes the investigation of the possibility of constructing multilayer perceptrons from such real fuzzy hardware units. Each of the four candidates for F3-based neurons is examined for its training capability by evaluating and comparing the approximation capabilities for two different transcendental functions. Simulation results are presented. © 2008 IEEE.

Open Access: Yes

DOI: 10.1109/FUZZY.2008.4630597