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Found 6278 publications

Observation of zonal flow-like structures using the autocorrelation-width technique

M. Berta J. Adamek M. Hron S. Zoletnik A. Bencze J. Stöckel

Publication Name: Plasma Physics and Controlled Fusion

Publication Date: 2006-04-01

Volume: 48

Issue: 4

Page Range: S137-S153

Description:

This paper presents the first application of the autocorrelation-width technique (Bencze A and Zoletnik S 2005 Phys. Plasmas 12 052323) to detect and characterize the microturbulence-zonal flow system using fluctuating signals ( , ) measured by arrays of single-tip Langmuir probes in the CASTOR tokamak. Radially localized (≈1 cm) random flow structures have been clearly observed with a lifetime of ≈1 ms and a long-range poloidal correlation, extending over at least one-fourth of the poloidal circumference. © 2006 IOP Publishing Ltd.

Open Access: Yes

DOI: 10.1088/0741-3335/48/4/S10

Using multi-attribute decision-making technique for the selection of agribots via newly defined fuzzy sets

Nurnadiah Zamri Dragan Pamucar Loredana Ciurdariu Muhammad Bilal Khan Mohamed Abdelwahed

Publication Name: Aims Mathematics

Publication Date: 2025-01-01

Volume: 10

Issue: 5

Page Range: 12168-12204

Description:

Reference parameter mapping (passing arguments by reference) is a technique where the reference (like to find physical meaning, memory address) of a parameter is passed to a function or procedure, rather than a copy of the parameter’s value. This approach enables changes made to the parameter within the function to affect the original data. In decision-making systems, reference parameter mapping (passing arguments by reference) offers several key advantages that enhance flexibility, consistency, and efficiency. This is especially useful in scenarios where decisions are based on shared data, complex interactions, and iterative updates. In this paper, a new class of fuzzy set was introduced that is known as the (q1 ,q2 )-rung Diophantine fuzzy set, where q1 and q2 are reference parameter mappings. Most of the classical and new generalized fuzzy sets are exceptional classes of (q1 , q2 )-rung Diophantine fuzzy set ((q1 ,q2 )- RDFS) like intuitionistic fuzzy set (IFS), Pythagorean fuzzy Sets (PyFSs) and q-rung Orthopair fuzzy sets (q-ROFSs), linear Diophantine fuzzy sets (LDFS), and so on. It is commonly seen in multi-criteria decision-making (MCDM) scenarios that the presence of imprecise information and ambiguity in the decision maker's judgment affects the resolution technique. Fuzzy models that are now in use are unable to effectively manage these uncertainties to provide an appropriate balance during the decision-making process. Using control (reference) parameter mappings, (q1 , q2 )- RDFSs are potent fuzzy model that can handle these challenging problems. Two more novel ideas are presented in this work: (q1 ,q2 )-rung Diophantine fuzzy averaging and geometric aggregation operators with newly defined score and accuracy functions. An agricultural fieFS robot MCDM framework was proposed, incorporating (q1 ,q2 )-rung Diophantine fuzzy averaging and geometric aggregation operators. This strategy's efficacy and adaptability in addressing real-worFS issues were demonstrated by its application to get more benefits. This study has a lot of potential to handle difficult socioeconomic issues and offer vital information to academic, government, and analysts searching for fresh approaches in a variety of fieFSs.

Open Access: Yes

DOI: 10.3934/math.2025552

In search of the nature of specific nucleic acid-protein interactions

B. Benyo J. C. Biro Z. Benyó C. Sansom

Publication Name: Acta Physiologica Hungarica

Publication Date: 2005-06-23

Volume: 92

Issue: 1

Page Range: 1-10

Description:

The theory of "codon-amino acid coevolution" was first proposed by Woese in 1967. It suggests that there is a stereochemical matching - that is, affinity - between amino acids and certain of the base triplet sequences that code for those amino acids. We have constructed a Common Periodic Table of Codons and Amino Acids, where the Nucleic Acid Table showed perfect axial symmetry for codons and the corresponding Amino Acid Table also displayed periodicity regarding the biochemical properties (charge and hydrophobicity) of the 20 amino acids and the position of the stop signals. The Table indicates that the middle (2nd) amino acid in the codon has a prominent role in determining some of the structural features of the amino acids. The possibility that physical contact between codons and amino acids might exist was tested on restriction enzymes. Many recognition site-like sequences were found in the coding sequences of these enzymes and as many as 73 examples of codon-amino acid co-location were observed in the 7 known 3D structures (December 2003) of endonuclease-nucleic acid complexes. These results indicate that the smallest possible units of specific nucleic acid-protein interaction are indeed the stereochemically compatible codons and amino acids. © 2005 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/APhysiol.92.2005.1.1

An insightful multicriteria model for the selection of drilling technique for heat extraction from geothermal reservoirs using a fuzzy-rough approach

Daekook Kang Dragan Pamucar Samayan Narayanamoorthy Krishnan Suvitha Michael Sandra Vladimir Simic

Publication Name: Information Sciences

Publication Date: 2025-01-01

Volume: 686

Issue: Unknown

Page Range: Unknown

Description:

Geothermal energy stands out as an exceptional renewable resource for power generation, offering a consistent power production without the intermittency issues. Despite its potential to deliver a consistent supply of electricity on demand, geothermal adoption is hindered due to substantial costs. Utilising the most effective drilling method can alleviate this challenge by boosting efficiency and reducing operational costs. The primary goal of this study is to identify the best drilling method for extracting heat from geothermal reservoirs. This optimised approach facilitates better access to geothermal reservoirs, leading to increased heat recovery rates and improved project viability. Traditional methods often fall short in evaluating optimal drilling alternatives due to uncertainties. To address this, our research introduces an innovative paradigm that integrates novel T-Spherical Hesitant Fuzzy Rough (T−SHFR) set, method for the removal effects of criteria with a geometric mean and ranking alternatives with weights of criterion hybrid Multiple Criteria Decision-Making (MCDM) techniques. By leveraging the novel T−SHFR concept, our approach allows for a comprehensive assessment of various factors. This holistic evaluation ensures an exhaustive comprehension of the decision-making environment. The study reveals that reservoir characteristics play a significant role in selecting a sustainable drilling alternative. Furthermore, directional drilling appears as the most promising method with higher energy yields followed by slim hole drilling. The robustness and credibility of these findings are established through sensitivity and comparative analyses, indicating the potential applicability of this MCDM method to analogous challenges in different contexts. The findings of the ranking techniques were validated using Spearman's rank correlation coefficient, which revealed a positive and notable correlation. This research will empower stakeholders to make informed decisions, thereby enhancing the overall efficiency and sustainability of geothermal energy projects.

Open Access: Yes

DOI: 10.1016/j.ins.2024.121353

INVESTIGATION OF HEAT-AFFECTED ZONES OF THERMITE RAIL WELDINGS

Szabolcs Fischer Mykola Sysyn Dmytro Kurhan B. Kocsis Dóra Harangozó Dalma Németh András Brautigam

Publication Name: Facta Universitatis Series Mechanical Engineering

Publication Date: 2024-12-01

Volume: 22

Issue: 4

Page Range: 689-710

Description:

The paper investigates the heat-affected zone (HAZ) of several rail joints executed by thermite rail welding (TW). The examined rail profile was 54E1 (UIC54). The rail steel categories were different: R260 and R400HT. The welding portions of the TWs fitted R350HT and R260 rail categories with normal welding gaps. The rail pieces were brand new, i.e., without any usage in the railway track. The authors executed Vickers-hardness tests (HV10) and material texture tests on the running surface of the rail head, as well as on slices cut from the rail head. The cutting was performed by the water jet method, five longitudinal direction slices with vertical cutting lines. The considered specimen lengths were 2×70 mm (i.e., 70 mm from the mid-point of the rail joint), however, the depths were 20 mm from the running surface. Therefore, the measuring spaces were 5 mm lengthwise and 2 mm in depth. The variation of the hardness values was determined considering the microstructures of the base steel material and the TW. For comparison, previously measured Elektrothermit SoW-5 and earlier own research were taken into consideration.

Open Access: Yes

DOI: 10.22190/fume221217008f

Rediscovery of Livilla radiata (Foerster, 1848) after 130 years in Hungary, with notes to the Fabaceae-associated jumping plant lice in Hungary (Insecta: Psylloidea)

Jenő Kontschán Takács Attila Klaudia Kőszegi

Publication Name: Ecologica Montenegrina

Publication Date: 2024-01-01

Volume: 71

Issue: Unknown

Page Range: 139-143

Description:

No description provided

Open Access: Yes

DOI: 10.37828/em.2024.71.13

Exopolysaccharides from lactic acid bacteria: Techno-functional application in the food industry

E. Korcz László Varga

Publication Name: Trends in Food Science and Technology

Publication Date: 2021-04-01

Volume: 110

Issue: Unknown

Page Range: 375-384

Description:

Background: The growing consumer demand for foods that do not contain artificial additives and are “clean labeled” can be addressed in fermented products by using lactic acid bacteria (LAB) capable of synthesizing exopolysaccharides (EPS). There is great variability in LAB-based EPS in terms of quantity, monomer composition, molecular weight, charge, and structure, which results in an array of physicochemical and rheological properties that can be exploited for varied applications in the food industry. Scope and approach: EPS are an alternative class of bio-thickeners widely used in the food industry. This review provides a brief overview of EPS composition and production, and highlights EPS functionality, focusing on specific areas and ways of applying them in food products. Key findings and conclusions: Although EPS-producing LAB strains have been traditionally applied in the manufacture of cultured milks, their use in the production process of low-fat cheeses, different plant-based yogurt alternatives, diverse types of sourdough breads, and reduced-fat fermented meat products are some of the novel applications of these polymers. EPS interact with other food components to improve the rheological and sensory properties of foods and, thus, they can act both as texturizers and stabilizers, increasing the viscosity and mouthfeel of products. Despite the abundance of research findings, a better understanding of the structure–function relationship of EPS in food products still remains a challenge.

Open Access: Yes

DOI: 10.1016/j.tifs.2021.02.014

Multiresolution modeling of cavity resonators in microwave systems

András Fehér Brigita Sziová János Pipek Szilvia Nagy

Publication Name: 2016 13th International Conference on Synthesis Modeling Analysis and Simulation Methods and Applications to Circuit Design Smacd 2016

Publication Date: 2016-07-25

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Multiresolution analysis or wavelet analysis provides a toolbox not only for signal processing, but also for synthesis of complex systems. Wavelets can be used for modeling complex parts of microwave circuits, such as cavity resonators. The differential equations describing the physical behavior of the device can be discretized using multiple resolutions simultaneously, i.e., high resolutions, where the details of the geometry demand it, and low resolutions, where the geometry is smooth. Using wavelet analysis offers the possibility of systematic and adaptive refinement, where the result is not sufficiently precise. Our method gives an approximation for the error of the solution in order to make it possible to decide, whether refinements are necessary.

Open Access: Yes

DOI: 10.1109/SMACD.2016.7520651

Number archetypes, symbolic coding letters and "background communication theory" in Saint Stephen's royal mirror

Peter Varlaki József Bokor

Publication Name: Iccc 2009 IEEE 7th International Conference on Computational Cybernetics

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 201-211

Description:

Following Pauli's approach to the analysis of the Kepler's works, the paper attempts to identify patterns in the creative background cognitive processes related to a "background system and communication theory" in the thousand-year-old great Latin opus of St Stephen's Royal Mirror. Our paper is dedicated to the blessed memory of Prof. S. Csibi, the great scholar of communication theory, who creatively participated in this endeavour. ©2009IEEE.

Open Access: Yes

DOI: 10.1109/ICCCYB.2009.5393934