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Found 6341 publications

New Buckling Curve for a Compressed Member with Cold-Formed Channel Cross-Section

B. Vaszilievits-Sömjén F. Papp

Publication Name: Buildings

Publication Date: 2024-10-01

Volume: 14

Issue: 10

Page Range: Unknown

Description:

The verification of a column made from a lipped cold-formed channel section, subjected to pure axial compression relative to the gross cross-section, often results in a combined verification of bending and compression due to the appearance of a shift of the centroid of its effective cross-section. Following Eurocode 3 rules, this requires the determination of two distinct effective cross-sections and various interaction factors. This paper, based on an analytic approach, offers a modification to the actual buckling curve, based on Ayrton–Perry formulation, to include the second-order effects raised by the eventual shift of the effective centroid due to local buckling of the compressed web plate. This eliminates the need to use an interaction formula. The modified buckling curve is verified based on a GMNIA analysis performed on a numerical parametric model, which was previously validated by laboratory tests. In addition, the results are compared with strength results provided by appropriate Eurocode 3 formulas and AISI Direct Strength Method for global-local interaction and with classic experimental results.

Open Access: Yes

DOI: 10.3390/buildings14103258

Environmental Impact of the Hungarian Swine Sector during the PRRS Eradication Program with Full Herd Replacement (2014–2022)

István Szabó László Búza Szabó István László Gombos Veronika Szűr-Gombos László Varga

Publication Name: Animals

Publication Date: 2024-10-01

Volume: 14

Issue: 20

Page Range: Unknown

Description:

The Porcine Reproductive and Respiratory Syndrome (PRRS) eradication program in Hungary, implemented between 2014 and 2022, utilized complete herd replacement and the introduction of high-performance breeds to enhance production efficiency and environmental sustainability in the swine sector. As a result, the sow population was reduced by 26.2% while maintaining nearly the same number of slaughter pigs. This led to significant reductions in ammonia emissions (−145,857 kg), slurry production (−153,879 m3), nitrogen emissions (−1,409,951 kg), and overall greenhouse gas emissions (91,768,362 kg CO2eq). Additionally, the feed and water consumption were substantially decreased by 53,237,805 kg and 292,978,094 L, respectively, further lowering the sector’s environmental footprint. The study demonstrates the effectiveness of customized eradication strategies and advanced breeding practices in reducing the environmental impact of animal husbandry. These findings underscore the necessity for ongoing collaboration among scientists, policymakers, and industry stakeholders to develop and implement sustainable livestock production methods. The Hungarian experience provides valuable insights into how targeted interventions can simultaneously improve production outcomes and reduce the environmental burden in the swine industry.

Open Access: Yes

DOI: 10.3390/ani14202924

Enhancing fire-resistant design of reinforced concrete beams by investigating the influence of reliability-based analysis

János Szép Majid Movahedi Rad Muayad Habashneh

Publication Name: Engineering Reports

Publication Date: 2024-10-01

Volume: 6

Issue: 10

Page Range: Unknown

Description:

A depth investigation into the impact of high temperatures on the load-bearing capacity of reinforced concrete beams in the case of probabilistic design is presented in this paper, employing advanced finite element analysis techniques. This study addresses a critical knowledge gap in the design of fire-resistant concrete structures, with specific emphasis on the function of concrete cover. The research aims to enhance the overall safety and reliability of concrete buildings under high temperature conditions by providing valuable insights into the behavior of reinforced concrete beams under thermal loading. The analysis incorporates reliability-based modeling to account for uncertainties in temperature distribution within the beams. A validated finite element model is employed to simulate the performance of reinforced concrete beams at elevated temperatures. By considering various concrete cover thicknesses and heat distribution scenarios, the influence of these factors on the load-bearing capacity is thoroughly examined. The results underscore the importance of augmenting the concrete cover to enhance the load-carrying capacity of the beams. Furthermore, the study examines the impact of temperature distribution uncertainties, unveiling diverse load capacities associated with different configurations of concrete cover.

Open Access: Yes

DOI: 10.1002/eng2.12879

Using innovation and entrepreneurship for creating edge in service firms: A review research of tourism and hospitality industry

Gagan Deep Sharma Babak Taheri Dariusz Cichon Jaya Singh Parihar Aeshna Kharbanda

Publication Name: Journal of Innovation and Knowledge

Publication Date: 2024-10-01

Volume: 9

Issue: 4

Page Range: Unknown

Description:

This paper aims to inform policy and research in the domain of tourism and hospitality on the role of innovation and entrepreneurship. The paper applies the review research methodology to collate, comprehend, and synthesise 139 papers selected through a standard procedure. Our findings show that innovation drives growth and value in new tourism and hospitality firms. The study examines external factors, particularly government policies, influencing industry stakeholders’ entrepreneurial orientation and the macroeconomic environment affecting entrepreneurial activities. It also highlights the importance of social entrepreneurship in industry innovation and sustainability. This article emphasises the importance of innovation and entrepreneurship in tourism and hospitality growth, value creation, and social and environmental issues.

Open Access: Yes

DOI: 10.1016/j.jik.2024.100572

Novel α-divergence measures on picture fuzzy sets and interval-valued picture fuzzy sets with diverse applications

Gözde Ulutagay Dragan Pamucar Muhammet Deveci Zhe Liu Sijia Zhu Zhe Liu Zhe Liu

Publication Name: Engineering Applications of Artificial Intelligence

Publication Date: 2024-10-01

Volume: 136

Issue: Unknown

Page Range: Unknown

Description:

Currently, many studies have developed distance or divergence measures between intuitionistic fuzzy sets (IFSs) and interval-valued fuzzy sets (IvFSs). As a generalization of IFSs, picture fuzzy sets (PFSs) provide a more nuanced representation of uncertain and ambiguous information. Interval-valued picture fuzzy sets (IvPFSs) combine the concepts of IvIFSs and PFSs, providing a highly effective means of representing and processing uncertain, ambiguous and incomplete information. How to better measure the differences between PFSs and IvPFSs is still an open issue. This paper proposes some novel α-divergence measures for PFSs and IvPFSs, respectively. We demonstrate the basic properties of the proposed divergence measures, including non-negativity, non-degeneracy and symmetry. Besides, we analyze some special cases of the proposed divergence measures that degenerate into or are related to several well-known divergences. Then, we construct some numerical examples to demonstrate the effectiveness of the proposed measures concerning existing measures. Finally, the proposed α-divergence measures are applied to pattern recognition, multi-attribute decision-making (MADM) and clustering, demonstrating that these measures possess a high confidence level and can produce trustworthy results, especially in comparable situations.

Open Access: Yes

DOI: 10.1016/j.engappai.2024.109041

Bioactive Potential of Actinobacteria Strains Isolated from the Rhizosphere of Lavender, Lemon Balm, and Oregano

Balázs Ásványi E. Lakatos Babett Greff András Sáhó Viktor Karikás László Varga

Publication Name: Agriculture Switzerland

Publication Date: 2024-10-01

Volume: 14

Issue: 10

Page Range: Unknown

Description:

The objective of this study was to isolate and characterize actinobacteria from the rhizosphere of medicinal and aromatic plants, specifically lavender (Lavandula angustifolia Mill.), lemon balm (Melissa officinalis L.), and oregano (Origanum vulgare L.). Rhizospheric soil samples revealed a high abundance of culturable actinobacteria (6.97–7.23 log10 CFU/g). Six isolates were selected for their promising enzymatic activities (lignin peroxidase, carboxymethyl cellulase) and antimicrobial properties. Isolates M345 and M162 exhibited the highest cellulase activity indices (3.19 ± 0.71 and 2.54 ± 0.22, respectively), with five isolates producing lignin peroxidase. These actinobacteria also demonstrated plant growth-promoting traits such as phosphate solubilization and nitrogen fixation, along with strong antimicrobial activity against Gram-negative bacteria and phytopathogenic fungi. Additionally, they significantly enhanced maize seed germination, increasing the vigor index from 4283.33 ± 1264.37 to 6248.28 ± 1661.94 compared to that of the control. These results indicate that the isolated actinobacteria strains hold potential as microbial inoculants for sustainable agriculture, contributing to soil health, plant growth, and pathogen management.

Open Access: Yes

DOI: 10.3390/agriculture14101758

Evaluation of sustainability reporting of the food industry in Hungary from an EU taxonomy perspective

Károly Kacz Andrea Rózsa Szabolcs Troján Judit Hegyi Nóra Gombköto Ibolya Lámfalusi Judit Hámori Anita Miklósné Varga

Publication Name: Quality and Quantity

Publication Date: 2024-10-01

Volume: 58

Issue: 5

Page Range: 4479-4504

Description:

Compliance with green requirements is becoming increasingly important in assessing the performance of companies. The new CSRD legislation requires a wider range of companies to produce sustainability reports and their content is influenced by the EU's taxonomy regulation setting out the framework for sustainable finance. The disclosure of information affects the perception of companies' sustainability performance, which will affect their access to financial resources and development opportunities. The main question is, both in theory and in practice, how companies can comply with the legislation in the future. It is essential for the competitiveness of Hungary's food industry to keep pace with future environmental sustainability requirements, so we examined the sustainability reporting practices of the sector's key companies in terms of their contribution to the environmental objectives set out in the taxonomy regulation. The research fits well with the EU's overall green transition regulatory procedure and our study is gap-filling at macro-regional and sectoral levels. The sustainability reports were assessed by content analysis using a scoring method. The results show that the sustainability reporting practices of food processing companies in Hungary differ significantly. Furthermore, greater emphasis must be placed on reporting and the credibility of the reports to meet future expectations. Foreign-owned companies and companies with more than 500 employees attribute greater importance to reporting. In the food processing sector, the disclosure of information and data under the taxonomy objectives of mitigation of climate change, sustainable use of water and marine resources, and transition to a circular economy was most common.

Open Access: Yes

DOI: 10.1007/s11135-024-01873-2

The rise of interdisciplinarity: A new era in polymer research?

László Lendvai Alessandro Pegoretti

Publication Name: Express Polymer Letters

Publication Date: 2024-10-01

Volume: 18

Issue: 10

Page Range: 962-963

Description:

No description provided

Open Access: Yes

DOI: 10.3144/expresspolymlett.2024.73

Fuzzy Systems Based Voltage Control of Buck Converter for Vehicles with 48V E/E Architecture

Ahmet Mehmet Karadeniz Nuri Furkan Kocak

Publication Name: Journal of Electrical and Electronics Engineering

Publication Date: 2024-10-01

Volume: 17

Issue: 2

Page Range: 17-22

Description:

This paper investigates the efficiency of PID and Fuzzy Logic Control approaches as a voltage control method in vehicles with 48V E/E architecture. Then compares the mentioned methods output on Buck converter for 48V to 12V. Buck converter aims to convert 48V to 12V to be able to supply power to low voltage systems such as electric power steering systems within vehicles. 48V E/E architecture is becoming a common architecture among electric vehicles and power distribution through 48V batteries, hence it is chosen for this study. Our study presents that Fuzzy Logic Controller has a better performance in terms of response time and settling time on controlling output voltage of Buck converter which converts 48V to 12V.

Open Access: Yes

DOI: DOI not available